Added extra blocked commands used to bypass //brush 

I've added commands which enable //brush even though it is blocked (/size and //mask) to the blocked commands list (for superadmins only).
Restructured /saconfig. Resolves #322. Resolves #303.
Merge pull request #316 from KingDragonRider/master

Blocked /size and //mask. Resolves #316
Merge pull request #1 from TotalFreedom/master

PR1