Increase version number and update CHANGELOG.md

Update CHANGELOG and version number

Merge branch 'dev'

Update CHANGELOG and version number

Increase version number and edit CHANGELOG

Update version and Changelog

Merge pull request openPMD#143 from RemiLehe/robust_install

Close openPMD#142: pip install fails

Correct dependency

Modified CHANGELOG

Bumped version number and modified CHANGELOG.md