Release version 0.9.0

Release version 0.8.0

Release version 0.7.0

Update changelog, prepare release 0.6.1

Update changelog; release 0.6.0

Run tests on php7, too

update changelog, prepare release of 0.4.4

change license to OSL 3.0, prepare version 0.4.3

Release 0.4.2

tag 0.4.1