Make rmtree remove readonly files
Merge pull request #226 from pfmoore/rmtree

Make rmtree remove readonly files
Generate shell hooks dynamically for Unix/Windows portability
Adding @pfmoore to authors.
Merge branch 'pfmoore-hooks_tests_2'
Merge branch 'master' of github.com:audreyr/cookiecutter
Replace unicode_open with direct use of io.open