Text changes for community-led project

Primarily changes to documentation and support references, although some minor structure changes as well.

Conflicts:
	modules/config.modules.inc
Update README.md

Corrected lists under "Support"
Primary documentation updates (prep for 1.4.6-rc.2)
touchups to README.md syntax

Conflicts:
	.gitignore
Revert minor changes from cherry-picking
Update README.md
Use atkphpframework/atk instead of dalers/atk-6.4.4