update devise to 2.2.4
bump devise to 3.0.2
Remove post from the mobile site
Merge pull request #4408 from movilla/reremove_post

Remove post from the mobile site
remove comments from the mobile site. Close #4225
Merge pull request #4371 from MrZYX/bump_devise

Update devise
Merge pull request #4409 from movilla/remove_comments

Remove comments from the mobile site. Close #4225
Add header to the single post view
Add images, fix layout rendering
improve design
add missing sprite file
Add hacky bootstrap header fix for single post view.
Implement new single post view.
Questionable css for the new single post view.
Switch to new single post view.
Fix specs for new single post view.