Fixes #2617

* remove unused method
* simplify gravatar_icon

always use proper size value
do not show alt text when avatar image not loaded

Rewrite and improve git backend logic. Fix project movind. Raise exception to prevent unexpected issues

Simplifies some of the "active tab" checks we're doing

Uses TeamMembers#index instead, to be more RESTful

Merge branch 'master' into non-interactive-aws-install

Conflicts:
	doc/installation.md

Fix merge mess in installation.md

Closes #1237

Signed-off-by: Martin Bastien <martin.bastien@studiofrenetic.com>

Didn't bother with files in db/, config/, or features/