Removes Duplicate values from an Array. Note: This plugin is not the same as jquery's $.unqiue function, which works with the $.data functions.. as far as we (eis_os, gensmann, myself.) can tell.
Example
Input:
["john", "helen","fred", "john", "helen"];
["john", "helen", "fred"];
Notice: This plugin may include more array functions at a later date, if you would like to ask for something to be included, please catch me via email, or irc as miksago.