Added Faker::Finance#credit_card

Conflicts:
	lib/faker/finance.rb
	lib/locales/en.yml
Set British and U.S Virgin Islands to same as rails country_select gem

To make tests pass when using country select and faker in combination.
Remove typo
Match en locale address state_abbr to state

There are 50 US states and if the full names only include 50, we
shouldn't be adding more to the state_abbr.
Added Faker::Commerce.price
Add MAC address generator
Prefix can be specified to generated MAC addresses
Added missing National Area Codes for Poland. Fixes #169
Add korean locale file
Return the correct amount of words from lorem.words
Don't recommend installing gem with sudo
Fixed number generator to generate the correct number of digits
Added decimal generator
Added usage documentation for all sub-modules within Faker.
add farsi ( persian ) locale file
Add farsi ( persian ) locale file
Add farsi ( persian ) first names
Add farsi ( persian ) last names
Add farsi ( persian ) name prefix
Make MAC address generator not crash on ruby 1.8.7