fix test where to_json method is compare to a string

as in pyhton and json the order of the keys is not garantee,
we cannot compare to_json output directly with a hardcoded string.
I'ts better to transform both the hardcoded dtring and the to_json
output in json with the json library and compare the 2 resulting objects
Merge pull request #160 from mobyle2/fix_to_json_unit_test

fix test where to_json method is compare to a string
bump v0.9.1
fix typo in README
Update README.md name in MANIFEST.in
Merge pull request #165 from pior/master

Fix sdist 0.9.1 on PyPI failing on "No such file or directory: 'README.md'"
pep8 fixes
remove trailing whitespace
add support for binary types and the tests for it
Merge pull request #168 from emmanueljob/binary_support

Binary support
Merge branch 'master' of https://github.com/namlook/mongokit