reqs - fix avatar requirement
Correct the requirements files

Conflicts:

	shared/requirements.txt
reqs - add announcements
add block in profile page for messages
reqs - add flatblocks
profile page - ensure 'None' does not appear
handle ZIP for shouters, refs #487

this also fixes error handling when using straight ext form
upload and the zip contains no recognized files
return a simple html formatted error on upload
mapstory #496, minor profile page UI changes
Update the requirements file