Fix permission for other help command (why are there two?)
- Made registerhelp read from yaml (not that the setting does anything)
Added an option to override data value limits.
- This should fix some mods which use data values above 16
- May cause issues if set to true and people mess with vanilla data values
Added some missing license blocks
Added "and contributors" to all copyright notices.
Added $Id$ to files that were still missing it.
Changed "All rights reserved" to GPLv3 on Injector.java.