Sorted the items alphabetically in nav bar (#971)

* update Readme. License and added Discourse link

* sort items alphabetically in nav bar (nav.html)

_includes/nav.html

@@ -15,13 +15,13 @@
           </a>
           <div class="dropdown-menu" aria-labelledby="providerDropdown">
             <a class="dropdown-item" href="/providers/#ukusa"><i class="fab fa-creative-commons-nc fa-fw"></i> Avoid US & UK services</a>
-            <a class="dropdown-item" href="/providers/vpn/"><i class="far fa-eye-slash fa-fw"></i> VPN</a>
-            <a class="dropdown-item" href="/providers/email/"><i class="fas fa-mail-bulk fa-fw"></i> Email</a>
-            <a class="dropdown-item" href="/providers/search-engines/"><i class="fab fa-searchengin fa-fw"></i> Search Engines</a>
             <a class="dropdown-item" href="/providers/cloud-storage/"><i class="fas fa-cloud fa-fw"></i> Cloud Storage</a>
-            <a class="dropdown-item" href="/providers/social-networks/"><i class="fas fa-expand-arrows-alt fa-fw"></i> Social Networks</a>
             <a class="dropdown-item" href="/providers/dns/"><i class="fa fa-tasks fa-fw"></i> DNS</a>
+            <a class="dropdown-item" href="/providers/email/"><i class="fas fa-mail-bulk fa-fw"></i> Email</a>
             <a class="dropdown-item" href="/providers/hosting/"><i class="fas fa-database fa-fw"></i> Hosting</a>
+            <a class="dropdown-item" href="/providers/search-engines/"><i class="fab fa-searchengin fa-fw"></i> Search Engines</a>
+            <a class="dropdown-item" href="/providers/social-networks/"><i class="fas fa-expand-arrows-alt fa-fw"></i> Social Networks</a>
+            <a class="dropdown-item" href="/providers/vpn/"><i class="far fa-eye-slash fa-fw"></i> VPN</a>
           </div>
         </li>
         <li class="nav-item dropdown">
@@ -29,11 +29,11 @@
             Browser
           </a>
           <div class="dropdown-menu" aria-labelledby="browserDropdown">
-            <a class="dropdown-item" href="/browsers/#browser"><i class="fas fa-check fa-fw"></i> Recommendation</a>
             <a class="dropdown-item" href="/browsers/#fingerprint"><i class="fas fa-fingerprint fa-fw"></i> Fingerprint</a>
-            <a class="dropdown-item" href="/browsers/#webrtc"><i class="far fa-eye fa-fw"></i> WebRTC IP Leak</a>
             <a class="dropdown-item" href="/browsers/#addons"><i class="far fa-list-alt fa-fw"></i> Firefox Privacy Add-ons</a>
             <a class="dropdown-item" href="/browsers/#about_config"><i class="fas fa-wrench fa-fw"></i> Privacy Related Tweaks</a>
+            <a class="dropdown-item" href="/browsers/#browser"><i class="fas fa-check fa-fw"></i> Recommendation</a>
+            <a class="dropdown-item" href="/browsers/#webrtc"><i class="far fa-eye fa-fw"></i> WebRTC IP Leak</a>
           </div>
         </li>
         <li class="nav-item dropdown">
@@ -41,19 +41,18 @@
             Software
           </a>
           <div class="dropdown-menu" aria-labelledby="softwareDropdown">
-            <a class="dropdown-item" href="/software/email/"><i class="fas fa-envelope fa-fw"></i> Email Clients</a>
-            <a class="dropdown-item" href="/software/email/#messaging"><i class="fas fa-random fa-fw"></i> Email Alternatives</a>
-            <a class="dropdown-item" href="/software/im/"><i class="fab fa-telegram-plane fa-fw"></i> Instant Messenger</a>
-            <a class="dropdown-item" href="/software/voip/"><i class="fas fa-phone fa-fw"></i> Video & Voice Messenger</a>
-            <a class="dropdown-item" href="/software/file-sharing/"><i class="fas fa-file-export fa-fw"></i> File Sharing</a>
-            <a class="dropdown-item" href="/software/cloud/"><i class="fas fa-hdd fa-fw"></i> Self-Hosted Cloud Server</a>
-            <a class="dropdown-item" href="/software/file-sync/"><i class="fas fa-copy fa-fw"></i> Secure File Sync</a>
-            <a class="dropdown-item" href="/software/passwords/"><i class="fas fa-user-lock fa-fw"></i> Password Manager</a>
-            <a class="dropdown-item" href="/software/calendar-contacts/"><i class="far fa-calendar-alt fa-fw"></i> Calendar and Contacts Sync</a>
-            <a class="dropdown-item" href="/software/encryption-tools/"><i class="fas fa-lock fa-fw"></i> File Encryption</a>
-            <a class="dropdown-item" href="/software/networks/"><i class="fas fa-user-secret fa-fw"></i> Self-contained Networks</a>
             <a class="dropdown-item" href="/software/notebooks/"><i class="far fa-sticky-note fa-fw"></i> Digital Notebook</a>
+            <a class="dropdown-item" href="/software/email/#messaging"><i class="fas fa-random fa-fw"></i> Email Alternatives</a>
+            <a class="dropdown-item" href="/software/email/"><i class="fas fa-envelope fa-fw"></i> Email Clients</a>
+            <a class="dropdown-item" href="/software/encryption-tools/"><i class="fas fa-lock fa-fw"></i> File Encryption</a>
+            <a class="dropdown-item" href="/software/file-sharing/"><i class="fas fa-file-export fa-fw"></i> File Sharing</a>
+            <a class="dropdown-item" href="/software/im/"><i class="fab fa-telegram-plane fa-fw"></i> Instant Messenger</a>
+            <a class="dropdown-item" href="/software/passwords/"><i class="fas fa-user-lock fa-fw"></i> Password Manager</a>
             <a class="dropdown-item" href="/software/productivity/"><i class="fas fa-briefcase fa-fw"></i> Productivity Tools</a>
+            <a class="dropdown-item" href="/software/file-sync/"><i class="fas fa-copy fa-fw"></i> Secure File Sync</a>
+            <a class="dropdown-item" href="/software/networks/"><i class="fas fa-user-secret fa-fw"></i> Self-contained Networks</a>
+            <a class="dropdown-item" href="/software/cloud/"><i class="fas fa-hdd fa-fw"></i> Self-Hosted Cloud Server</a>
+            <a class="dropdown-item" href="/software/voip/"><i class="fas fa-phone fa-fw"></i> Video & Voice Messenger</a>
           </div>
         </li>
         <li class="nav-item dropdown">
@@ -61,12 +60,12 @@
             OS
           </a>
           <div class="dropdown-menu" aria-labelledby="osDropdown">
-            <a class="dropdown-item" href="/operating-systems/#os"><i class="fas fa-th-large fa-fw"></i> PC OS</a>
+            <a class="dropdown-item" href="/operating-systems/#aaddons"><i class="fas fa-th fa-fw"></i> Android Privacy Add-ons</a>
+            <a class="dropdown-item" href="/operating-systems/#win10"><i class="far fa-thumbs-down fa-fw"></i> Don't use Windows 10</a>
             <a class="dropdown-item" href="/operating-systems/#live_os"><i class="fas fa-compact-disc fa-fw"></i> Live CD OS</a>
             <a class="dropdown-item" href="/operating-systems/#mobile_os"><i class="fas fa-mobile-alt fa-fw"></i> Mobile OS</a>
-            <a class="dropdown-item" href="/operating-systems/#aaddons"><i class="fas fa-th fa-fw"></i> Android Privacy Add-ons</a>
+            <a class="dropdown-item" href="/operating-systems/#os"><i class="fas fa-th-large fa-fw"></i> PC OS</a>
             <a class="dropdown-item" href="/operating-systems/#firmware"><i class="fas fa-signal fa-fw"></i> Router Firmware</a>
-            <a class="dropdown-item" href="/operating-systems/#win10"><i class="far fa-thumbs-down fa-fw"></i> Don't use Windows 10</a>
           </div>
         </li>
         <li class="nav-item">