HG-156 Add tracking events
HG-156 Fix unit tests
Added gulp task to generate documentation
Unified naming
`docs` is not beeded here
App and server
More comments
HG-156 Tracking events changes

 * Use tracking function short alias
 * Use default values for all Mercury events
 * Move unit test hack to proper qunit setup function
 * Add “paginate” event
Merge branch master into branch HG-156
changed z-index of .lightbox-close-button
changed z-index of .lightbox-close-button
changed z-index of .lightbox-close-button
Added comments and Interface for ArticleComments
Merge branch 'doc' into comments
HG-156 remove unecessary param from track call
More comments and small fix
Merge branch 'master' into comments
Search request
Merge pull request #259 from Wikia/HG-190

Hg 190 (changed z-index of .lightbox-close-button)
Search request