Merge pull request #1 from ogx-io/develop

Develop
Merge branch 'develop'
Merge branch 'develop'
Merge branch 'develop'
Merge branch 'develop'
Merge branch 'develop'
Merge branch 'develop'
improve the user's avatar and add link onto it
Merge branch 'develop'
Merge branch 'develop'
Merge branch 'develop'
refine some styles
add the responsive style for mobile devices
refine the style of the floor of a post
refine the style of a post
upgrade the ruby and the rails
upgrade the ruby and the rails
add social share buttons