Property List for Mac development containing full uppercase US State/Possession names and two letter abbreviations.

Taken from:
http://www.usps.com/ncsc/lookups/usps_abbreviations.html

Usage:

// At the top of your class file (.m)
#import "NSString+USStateMap.h"

// Later in your class file (.m)

// Turn "California" -> "CA"
NSLog(@"What is the abbreviation for California? Answer: %@", [@"California" stateAbbreviationFromFullName]);

// Or

// Turn "CA" -> "California"
NSLog(@"What is the full name for the state abbreviation CA? Answer: %@", [@"CA" stateFullNameFromAbbreviation]);