v1.0.1

Release to get DOI on Zenodo. No changes from v1.0

Release based on first upload

This release is designed to 'lock-off' the release of the first upload so that the precise version of the software as used in the papers referred to in the README (http://dx.doi.org/10.1016/j.envsoft.2012.11.011 and http://dx.doi.org/10.1080/1747423X.2011.558601) is clear.