Release introducing k-means clustering and several additional functionalities

Merge pull request #45 from openego/dev

Release 0.3

This is the version 0.2 of eTraGo. This new version shall be install via

pip and a setup.py. Moreover there has been minor adjustments such as the creation of a callable etrago function.

First release of eTraGo

0.1

Merge branch 'dev'