Fix #863
Merge branch 'master' of github.com:concrete5/concrete5-5.7.0
Merge branch 'master' of github.com:concrete5/concrete5-5.7.0
Fix #865
Merge branch 'master' of github.com:concrete5/concrete5-5.7.0
fix login as user
Merge pull request #866 from evancooper/master

Social Link Attribute Progress
Close #519
tweaking button styles in waiting for me, updating for new version of fontawesome
Fix #603
fix
Close #867
Fixed crash which results from not having a thumbnail handle defined. http://screencast.com/t/q1vDJWanf
merge
Merge pull request #871 from Raverix/ResponsiveImageBug

Fixed crash which results from not having a thumbnail handle defined.