Group creation page styling

Remove sidebar from group create page, style progress navigation
differently. Also add hook for adding content below group home page
content.
Move some functionality out to plugins

Also remove the reference to Constant Contact in the footer.
Updates to maps & data page

Add new link to reports list, adjust li spacing.
Change footer "powered by" statement
Update to the CC Subscription Matrix
Break BuddyPress and Salud styles to own files

This is partially in preparation for moving the Salud pieces out to a
plugin, and partially to make the files easier to hunt through.
Merge branch '2.x' into styles-cleanup

Prepare for merging back into main branch.
Add check user utility page

Check for availability of user emails/usernames
Merge branch 'styles-cleanup' into 2.x
Use BP-current load more activity link
Merge branch '2.x' into blog-alternative

Conflicts:
	style.css
This merge was fraught with peril. Lots of style conflicts because the
branches had diverged quite a lot.