Integrated gists. Closes #119

Added gist comments
New version number is v1.5.5
Added code classes and resources
Integrated gists in user profile
Added repository browser. Closes #78.
Updated rainbow submodules. Closes #159
Added own themes

Because we need to set the body background too.
Link feed entry accessory button with event item
Swapped Search and Issues tabs
Fix crash when selecting the README file of a repository
Merge pull request #160 from aharren/master

Fix crash when selecting the README file of a repository
Added logging for token resolving
Updated default images
Code view improvements
Prevent clicking of unloaded item cells
Added quick switch for commits in recent commits feed
Reload buttons for repos and issues
Traded rainbow for highlight.js
Added file switcher for gists
Use code view for diffs, too