String generator extensions

[jasond-s]

Make the string 'like' another string.

e.g. Create an address 'like' string:
Passing:
new StringGenerator('40 Building, Road, City, C0d3')
Could return:
'542 hsolk, waoifd, dsa, 92j3b0'

[jasond-s]

This is pretty hardcore and I haven't had time to sit and ponder a decent algo for it, so have descoped from beta1.