Adding names

Added names:
Lars
Lene
Lena
Changing some names to unisex

Changed names:
Alex
Kim
Updating README.md
Changing the way to represent unisex names.

Unisex names are now stored as tuples, the tuple items are genders
sorted in descending order of likelihood.
Updated README.md to match tuple based ambiguous names
Merge pull request #3 from LarsJNielsen/master

Adding 3 names and changing two to unisex.