Add TownyPermissionSource implementation that uses Vault Chat API.
v0.84.0.2:
	- Allow negative upkeep on nations.
v0.84.0.3:
	- Change health regen to implement Bukkits new method for health
measurement.
Update minimum CB version to 2838
v0.84.0.4:
	- Zero Economy accounts when renaming/deleting Towns/Nation as Vault
doesn't support deleting them.
v0.84.0.5:
	- Minor performace changes to plot regen code.
Merge pull request #99 from ZerothAngel/master

Add TownyPermissionSource implementation that uses Vault Chat API
Update changelog
v0.84.0.6:
	- Fix permission check to use nation.kick command.
Grammar fix in english.yml
Added exponential bonus block price increase
bugfix
dump
changed config default value
Merge pull request #109 from Slind14/exponential_bonusblocks

Exponential Bonusblocks
v0.84.0.7:
	- Incremental price change for bonus plots (by Slind).
Merge remote-tracking branch 'upstream/master'
indentation & endlines