updated to 3.0 to match new api version number
disabling max-unverified days
- plugin sets player locale with playgrid-java so api calls include accept-language header
- refactored /register (more to go)
completed /register refactor
added craftbukkit and minecraft user agent strings
Merge branch 'master' into player_refactor

Conflicts:
	src/main/java/com/playgrid/bukkit/plugin/PlayGridMC.java
	src/main/java/com/playgrid/bukkit/plugin/command/RegisterCommandExecutor.java
	src/main/java/com/playgrid/bukkit/plugin/listener/PlayerConnectionListener.java
	src/main/resources/config.yml