closes #6 Applied tox and coverage

Signed-off-by: Kouhei Maeda <mkouhei@palmtb.net>
added badges travis-ci, coveralls, version.

Signed-off-by: Kouhei Maeda <mkouhei@palmtb.net>
Work around disable python 3.4 is not yet support in travis-ci.

Signed-off-by: Kouhei Maeda <mkouhei@palmtb.net>
Update classifiers.

Signed-off-by: Kouhei Maeda <mkouhei@palmtb.net>
Merge pull request #7 from mkouhei/apply_coverage

Apply coverage and tox