added the comment models.
Added some concerns
updated database
Added has many comments to user
added controllers for problem and solution comments
Fixed the tests
Move yard and redcarpet gems to development group
Start organizing the Gemfile
Organize the Gemfile some more and delete some unneeded comments from it
Update Gemfile.lock
Remove trailing whitespace
Fix a method call put in a confusing place
Fix a mismatched indent
Yard commenting for achievements, kanguages, and problems controllers
Ignore precompiled assets.
merge
Merge branch 'dev' of https://github.com/codeflash/codeflash into dev
Remove trailing whitespace
added comments functionality. fixed #115
YARD commented profiles controller and modified previous comments