(Invisibility) Ignore Hits In No-PvP Regions

Prevent getting hit / hitting someone in a no-pvp region from canceling your invisibility.
Merge pull request #23 from roastnewt/patch-1

(Invisibility) Ignore Hits In No-PvP Regions
Merge pull request #22 from Dumbo52/master

Add disable-tnt option.
Added /countdown functionality.
Merge pull request #24 from TheAcademician/master

Added /countdown functionality.
Update to compile against Java 7.
Added configuration save on disable to store changed countdown values.
Added configuration save on disable to store changed countdown values.
Merge origin/master
Addressed issue with config loading/saving.
Small permissions change for countdown formatting command.
Prevent flaming arrows from igniting TNT.