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.
Refactor region selectors to handle legacy versions a bit better.
Because chat doesn't allow the section sign to be sent, I have to send non-color codes. Meh.
closes#158
It can be used with //sel extend.
Also made //sel carry over some information about the selection into the new selection mode.
Also cleaned up the source of the RegionSelectors and the //sel command a bit.