New version 1.7.0 (SAP#135)

Update CHANGELOG.md
Update VERSION

New version 1.6.0

New version 1.5.0

New version 1.4.0

New version 1.3.0

Release 1.2.1

* Update CHANGELOG for 1.2.1

* update VERSION to 1.2.1

Release 1.2.0 (SAP#20)

Update VERSION to 1.2.0, add CHANGELOG

update VERSION to 1.1.2

add pypi badge

Merge pull request SAP#34 from i337562/travis

Setup for travis, with automatic versioning