Add the packaging metadata to build the keepassxc snap (#83)

snapcraft.yaml

@@ -0,0 +1,31 @@
+name: keepassxc
+version: develop
+summary: community driven port of the windows application “Keepass Password Safe”
+description: |
+  KeePassXC is an application for people with extremly high demands on secure
+  personal data management. It has a light interface, is cross platform and
+  published under the terms of the GNU General Public License.
+confinement: strict
+
+apps:
+  keepassxc:
+    command: desktop-launch keepassxc
+    plugs: [unity7, opengl, gsettings, home]
+
+parts:
+  keepassxc:
+    source: .
+    plugin: cmake
+    configflags:
+      - -DCMAKE_BUILD_TYPE=Release
+      - -DWITH_TESTS=OFF
+    build-packages:
+      - g++
+      - libgcrypt20-dev
+      - libmicrohttpd-dev
+      - libqt5x11extras5-dev
+      - qtbase5-dev
+      - qttools5-dev
+      - qttools5-dev-tools
+      - zlib1g-dev
+    after: [desktop-qt5]