added css item to TreeItem, this allow you to define css icons in bootstrap templeting systems
Merge branch 'master' of git://github.com/jsheffie/django-sitetree into feature/sitetree-css
Added migration for css field on TreeItem
Added headers and dividers for use with Bootstrap
Merge branch 'feature/sitetree-css'
Added inmenu to QuerySetManager for use in templates
Revert "Added inmenu to QuerySetManager for use in templates"

This reverts commit 634b529fcdd86b5e7ab43c997c25c30ec207dff4.
Merge branch 'master' into feature/upstream