Add three PETS'17 papers.

Changelog.txt

@@ -1,3 +1,8 @@
+* 2017-06-27
+	- Added paper ``A Usability Evaluation of Tor Launcher''
+	- Added paper ``DeltaShaper: Enabling Unobservable Censorship-resistant TCP Tunneling over Videoconferencing Streams''
+	- Added paper ``Topics of Controversy: An Empirical Analysis of Web Censorship Lists''
+
 * 2017-05-22
 	- Added paper ``Augur: Internet-Wide Detection of Connectivity Disruptions''
 

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">2017-05-22</a> <br />
+      Last updated: <a href="Changelog.txt">2017-06-27</a> <br />
     </div>
   </div>
 </div>

references.bib

@@ -1,3 +1,39 @@
+@article{Barradas2017a,
+	author = {Diogo Barradas and Nuno Santos and Lu\'{i}s Rodrigues},
+	title = {{DeltaShaper}: Enabling Unobservable Censorship-resistant {TCP} Tunneling over Videoconferencing Streams},
+	journal = {Privacy Enhancing Technologies},
+	volume = {2017},
+	number = {4},
+	publisher = {De Gruyter Open},
+	year = {2017},
+	pages = {1--18},
+	url = {https://petsymposium.org/2017/papers/issue4/paper15-2017-4-source.pdf},
+}
+
+@article{Weinberg2017a,
+	author = {Zachary Weinberg and Mahmood Sharif and Janos Szurdi and Nicolas Christin},
+	title = {Topics of Controversy: An Empirical Analysis of Web Censorship Lists},
+	journal = {Privacy Enhancing Technologies},
+	volume = {2017},
+	number = {1},
+	publisher = {De Gruyter Open},
+	year = {2017},
+	pages = {42--61},
+	url = {https://petsymposium.org/2017/papers/issue1/paper06-2017-1-source.pdf},
+}
+
+@article{Lee2017a,
+	author = {Linda Lee and David Fifield and Nathan Malkin and Ganesh Iyer and Serge Egelman and David Wagner},
+	title = {A Usability Evaluation of Tor Launcher},
+	journal = {Privacy Enhancing Technologies},
+	volume = {2017},
+	number = {3},
+	publisher = {De Gruyter Open},
+	year = {2017},
+	pages = {87--106},
+	url = {https://petsymposium.org/2017/papers/issue3/paper2-2017-3-source.pdf},
+}
+
 @inproceedings{Pearce2017a,
 	author = {Paul Pearce and Roya Ensafi and Frank Li and Nick Feamster and Vern Paxson},
 	title = {{Augur}: {Internet}-Wide Detection of Connectivity Disruptions},