Fixed Sierra Trading post logo transparency. Dropped PMG Austin and RepZio logos until transparent versions can be found. Switched to local copy of eksponent logo.
Added subheader to reduce confusion
Made standalone statement larger, added link to the Redistribution and CMS integration guide.
Merge remote-tracking branch 'refs/remotes/github/smart-theme-migration' into smart-theme-migration

Conflicts:
	content/docs/workswith/index.slim
Made community box clickable, added links to Best Practices and Community page
Merge remote-tracking branch 'refs/remotes/github/smart-theme-migration' into smart-theme-migration