Removed unsupported app thumbnails
template and tutorial  with both Bootstrap 3 and 2
Added long_description in MarkDown
Use Markdown long description file when creating an app
Use FontAwesome icons
Use img-thumbnail BS3 class and changed app to project
Use progress-bar instead of bar (BS3)
Use alert-danger instead of alert-error (BS3)
Use better question icon
Fix to fit theme snippet
Added img-responsive class to fit theme snippet
Merge pull request #18 from PyBossa/updates

Updates