Fixed error : raise TypeError(repr(o) + " is not JSON serializable") , TypeError: ObjectId('') is not JSON serializable
Merge pull request #313 from delciotorres/master

The mongoengine auth example won't work TypeError and AttributeError
refs #1, rename property
refs #3, fixed sqlalchemy.exc.DataError when saving empty AjaxSelectMultipleField
Merge pull request #314 from zavatskiy/issue_3

refs #3, fixed sqlalchemy.exc.DataError when saving empty AjaxSelectMultipleField
Merge remote-tracking branch 'upstream/master'
Merge branch 'master' into markitup
add css and js files, add initialization