Add spec to CommentController

[Issue #20] https://github.com/hutusi/ideaegg/issues/20
Add style to comments

[Issue #20] https://github.com/hutusi/ideaegg/issues/20
Add style to users#show page

[Issue #20] https://github.com/hutusi/ideaegg/issues/20
Change style of font

[Issue #20] https://github.com/hutusi/ideaegg/issues/20