Append style elements to head

Conflicts:
	admin/client.js
	client/options.js
Sync last post on connection drop

Prevents jumping to the bottom of the thread on reconnection
Resolves bakape#79

Conflicts:
	client/conn.js
SVG uploads
Remove legacy connection indicator code

Conflicts:
	client/conn.js
Reduce #lock size

Because 1 Firefox em > 1 Webkit em, apparently
Ratio in fileinfo