Merge pull request #8 from chrissie1/master

pluralize and singularize
Merge pull request #9 from chrissie1/master

license, readme and more tests for pluralize and singularize
Fix samples in ReadMe

Fixed variables names in readme, also marked them as mutable (var) where applicable.
Merge pull request #10 from nskvortsov/patch-1

Fix samples in ReadMe
Merge remote-tracking branch 'upstream/master'

Conflicts:
	README.md