Bukkit

* Fixed an invalid permission issue with /givearrow
* Fixed the /givearrow command always printing "invalid arrow type x given" for valid arrows
* Fixed air arrows rarely applying its effect. It should now apply 100% of the time
* The particle loop is now slightly more efficient; Will only kill arrows when necessary and runs less operations
* Documented a bunch of methods in the main class and fixed older documentation (More clear & cleaner)