added a wrapper class for the zipcode api and added a method to the user class parse_zip that takes zipcode and radius and returns an array of zipcodes within the raidus-set to miles
changed variable names in parse_zip from nonrelevant names to relevant names
Merge pull request #45 from fence-lizards-2014/zipcodegrouping

added a wrapper class for the zipcode api and added a method to the user...
Sam