Add ISC'16 paper.

Thanks, David!

Changelog.txt

@@ -1,3 +1,6 @@
+* 2016-07-01
+	- Added paper ``Leveraging Internet Services to Evade Censorship'' (thanks, David!)
+
 * 2016-06-02
 	- Added paper ``Games Without Frontiers: Investigating Video Games as a Covert Channel''
 

header.tpl

@@ -83,7 +83,7 @@
       (<a href="author_reverse.html">reverse</a>) <a href="author.html">author</a> <br />
       Feedback: <a href="mailto:phw@nymity.ch">phw@nymity.ch</a> (<a
       href="https://nymity.ch/openpgp_public_key.txt">OpenPGP</a>) <br />
-      Last updated: <a href="Changelog.txt">2016-06-02</a> <br />
+      Last updated: <a href="Changelog.txt">2016-07-01</a> <br />
     </div>
   </div>
 </div>

references.bib

@@ -1,3 +1,12 @@
+@inproceedings{Zarras2016a,
+	author = {Apostolis Zarras},
+	title = {Leveraging {Internet} Services to Evade Censorship},
+	booktitle = {Information Security Conference},
+	publisher = {Springer},
+	year = {2016},
+	url = {https://www.sec.in.tum.de/assets/Uploads/camouflage.pdf},
+}
+
 @inproceedings{Hahn2016a,
 	author = {Bridger Hahn and Rishab Nithyanand and Phillipa Gill and Rob Johnson},
 	title = {Games Without Frontiers: Investigating Video Games as a Covert Channel},