Changing Mayotte country code

Mayotte (YT) country code was changed from 269 to 262 in early 2007.
(See http://www.wtng.info/wtng-262-fr.html and
https://en.wikipedia.org/wiki/Telephone_numbers_in_France)
Merge pull request #74 from illoyd/master

Update Mayotte (YT) country code from 269 to 262.