French translation of ingame messages
Naming
Rework some logic for clarity
Fix exception on /xpkwd with no arguments
Fix startup crash with latest 1.7.2-R0.3-SNAPSHOT builds
Added the ability to colour the first line of the sign

`/xpkc [colour code]` eg &3, &c etc
Merge remote-tracking branch 'upstream/master'

Conflicts:
	pom.xml
	src/main/java/me/eccentric_nz/plugins/xpkeeper/XPKPistonListener.java
	src/main/java/me/eccentric_nz/plugins/xpkeeper/XPKarrgghh.java
	src/main/java/me/eccentric_nz/plugins/xpkeeper/XPKbreak.java
	src/main/java/me/eccentric_nz/plugins/xpkeeper/XPKeeper.java
	src/main/java/me/eccentric_nz/plugins/xpkeeper/XPKplayer.java
	src/main/java/me/eccentric_nz/plugins/xpkeeper/XPKsign.java
	src/main/resources/plugin.yml