use python requirements in travis deploy stage

installing all requirements might be inefficient, but its annoying when
a bug is caused by old maturin version, and you'd expect it to be fixed
by updating the version in requirements.txt

fix typo

PYPI_PASSWORD is a variable

Merge pull request #97 from pattonw/bumpversion

update pattern matching in bumpversion, und bump up a patch

Merge pull request #85 from clbarnes/maturin

WIP: maturin (formerly pyo3-pack)

Bump version: 0.1.1 → 0.1.2

Bump version: 0.1.0 → 0.1.1