Merge tag 'v0.1.1' into develop

It works
Sage (comment email should be 'sage')
Admin page
Slightly more informative views (username and time, also /boards page)
Pretty forms
Reply db with topic-comment replies (T->T, T->C, C->C, C->T)
Now topics and comments can reply each other
Eager loading for replies in shared/topic_full
Show list of replies under post
add validation tests for models
add tests for models
Merge branch 'develop' of github.com:pbsphp/railchan into develop
Comment preview when mouse on reply link (needs to refactor)
Comment preview when mouse on reply link (links in text)
Reply links now will be parsed by js
active_admin js moved from assets to vendors (bug)
Merge branch 'feature/replies' into develop
Merge branch 'develop' of https://github.com/pbsphp/railchan into develop
Database seeds (groups and empty boards)
Small views refactoring (1)