Added AlphaNumericGenerator and Unit Tests

Added an AlphaNumericGenerator with length.
Changed unit tests to use NUnit instead of MBUnit, as this seems easier
to use and more prevelant.
Added United Kingdom Cities
Added United Kingdom Counties
Better UK Cities list
Added United Kingdom PostCodes
Converted all reports to Nunit
fixing merge
Merge branch 'fuzzy-afterlife-master'
Bumpped version number to 7.0
Update README.md