Change password and fixes

*Renamed "Control" tab to "Settings"
*Added "Profile Settings" under "Settings"
*Profile Settings has the ability for a user to change their own
password
*Added new error messages
*Limited gridrefs to users with 'semi' accesslvl, they are now
classified. (Will be configurable in the future)
Merge branch 'master' of https://github.com/Marcuzz/DayZAdmin

Conflicts:
	admin.php
	modules/tables/rows.php