Revert "Changed "nickname" field to "fb_nickname""

This reverts commit 755cb8cd2f0f7f2c8ff89b668e35c8178ae1ebe5.
Revert "Commenting out all LinkedIn code"

This reverts commit 65351ed2942b0729ec39794ee151ef4d3e20b4ae.
Revert "Properly placed "end" tag"

This reverts commit 2d066acabdefb9397ed0b14d096c1a089afca67d.
Revert "Removed LinkedIn authorization in order to test new facebook fields"

This reverts commit 0c9fd9c90e1ecff1e60ea876202ebfd0c9d5c32d.
Revert "Adding LinkedIn verification in user model"

This reverts commit 8c50b3086dfd904ddd86836dff4575e187e8ee7d.
Fixed facebook login redirect