Added unique=True to slug fields on photo and gallery and cleared up some help text for gallery uploads.
Added unique=True to slug fields on photo and gallery and cleared up some help text for gallery uploads.

git-svn-id: 7cd57066f4757936737e83af525e37846a788f28@126 2d8b3452-2338-0410-8a60-9550768eb463

jlemaes/django-photologue,RossLYoung/django-photologue,jlemaes/django-photologue,rmaceissoft/django-photologue,seedwithroot/django-photologue-clone,rmaceissoft/django-photologue,RossLYoung/django-photologue,RossLYoung/django-photologue,seedwithroot/django-photologue-clone,petry/django-photologue-old,georgemarshall/django-photologue,rmaceissoft/django-photologue,MathieuDuponchelle/my_patched_photologue,MathieuDuponchelle/my_patched_photologue,jlemaes/django-photologue