debianize influxdb-python

so that we can generate a debian package with command:
dpkg-buildpackage -us -uc
update .gitignore
update deb packaging for requirement requests>=1.0.3

this is required because influxdb-python uses response.json() api
(json was not callable before requests version < 1.0.3)
Merge pull request #15 from bbinet/debian-packaging

debianize influxdb-python