new repo ui

- copy link button: #1396, #1168, #1668,
- synxtax highlight: #1712, #1549, #1315, #670
- z-index: #1942

public/less/_octicons.less

@@ -1,6 +1,6 @@
-// v3.1.0
+// v3.3.0
 @octicons-font-path: "../fonts";
-@octicons-version:   "396334ee3da78f4302d25c758ae3e3ce5dc3c97d";
+@octicons-version:   "30e752e9a0821a0a098947055eeece0b0f46bc34";
 
 @font-face {
   font-family: 'octicons';
@@ -40,6 +40,7 @@
 .octicon-microscope:before,
 .octicon-beaker:before { content: '\f0dd'} /*  */
 .octicon-bell:before { content: '\f0de'} /*  */
+.octicon-bold:before { content: '\f0e2'} /*  */
 .octicon-book:before { content: '\f007'} /*  */
 .octicon-bookmark:before { content: '\f07b'} /*  */
 .octicon-briefcase:before { content: '\f0d3'} /*  */
@@ -120,6 +121,7 @@
 .octicon-issue-closed:before { content: '\f028'} /*  */
 .octicon-issue-opened:before { content: '\f026'} /*  */
 .octicon-issue-reopened:before { content: '\f027'} /*  */
+.octicon-italic:before { content: '\f0e4'} /*  */
 .octicon-jersey:before { content: '\f019'} /*  */
 .octicon-key:before { content: '\f049'} /*  */
 .octicon-keyboard:before { content: '\f00d'} /*  */
@@ -134,6 +136,7 @@
 .octicon-mirror-private:before,
 .octicon-git-fork-private:before,
 .octicon-lock:before { content: '\f06a'} /*  */
+.octicon-logo-gist:before { content: '\f0ad'} /*  */
 .octicon-logo-github:before { content: '\f092'} /*  */
 .octicon-mail:before { content: '\f03b'} /*  */
 .octicon-mail-read:before { content: '\f03c'} /*  */
@@ -180,8 +183,6 @@
 .octicon-rocket:before { content: '\f033'} /*  */
 .octicon-rss:before { content: '\f034'} /*  */
 .octicon-ruby:before { content: '\f047'} /*  */
-.octicon-screen-full:before { content: '\f066'} /*  */
-.octicon-screen-normal:before { content: '\f067'} /*  */
 .octicon-search-save:before,
 .octicon-search:before { content: '\f02e'} /*  */
 .octicon-server:before { content: '\f097'} /*  */
@@ -201,8 +202,10 @@
 .octicon-tag-remove:before,
 .octicon-tag-add:before,
 .octicon-tag:before { content: '\f015'} /*  */
+.octicon-tasklist:before { content: '\f0e5'} /*  */
 .octicon-telescope:before { content: '\f088'} /*  */
 .octicon-terminal:before { content: '\f0c8'} /*  */
+.octicon-text-size:before { content: '\f0e3'} /*  */
 .octicon-three-bars:before { content: '\f05e'} /*  */
 .octicon-thumbsdown:before { content: '\f0db'} /*  */
 .octicon-thumbsup:before { content: '\f0da'} /*  */