Added getPlayerNames to Utilities.Players
Add tabcomplete TODO in subcommand
There has to be an API for it - bukkit does tab completes too!
Avoid double-iteration by implementing tab complete loop in method, not
using utility classes
Remove unnecessary equalsIgnoreCase check
From startsWith documentation: "Note also that true will be returned if
the argument is an empty string or is equal to this String object as
determined by the equals(Object) method."
Since we do case stripping, this is perfectly sufficient, and we can
avoid a double-check by removing this call