Fix logins and avatar appearance. Contains a Migration. May contain nuts.

This will cause visual params to be persisted along with worn items. With
this, alpha and tattoo laters will be saved. Multiple layers MAY work, but
not tested because I don't use Viewer 2.

OpenSim/Data/MySQL/Resources/Avatar.migrations

@@ -10,3 +10,11 @@ CREATE TABLE Avatars (
 	KEY(PrincipalID));
 
 COMMIT;
+
+:VERSION 2
+
+BEGIN;
+
+alter table Avatars change column Value Value text;
+
+COMMIT;