Changed version back to 0.8.0 on master to keep it separated from dev

prepared for 0.7.1 release

prepared for v0.7.0 release

fixed typo in update script

fixed version number

preparation for release v0.5.0

Merge pull request hashtopolis#337 from s3inlc/dev

Complete dev containing 0.5.0 development

updated changelog

prepare for v0.4.2

preparations for 0.4.1