ChatMessage model and CurrentUserField
Stubbed message create and list views
Template hypertext
prepare to append to import list
cuser middleware
model for chat message
preparing to append to import list
chat message list view
message_list url for message list view, and link to it
message create view
message_create url and links for message create view
Merge branch 'dev' into backports

Conflicts:
	chat/templates/chat/chatmessage_form.html