Update README to reflect availability of osquery on PyPi (osquery#38)

table plugin: Convert all values to strings (osquery#36)

Merge pull request osquery#25 from osquery/1.8.0

Bump version to 1.8.0

Remove pypi-invalid RST link in README

Change version to 0.1.1 to reflect module versioning

Merge pull request osquery#14 from thedrow/patch-1

Moved travis workers to the sudoless environment and enabled caching