fixes #15 - staged rollouts
Merge pull request #16 from DavidHamm/google-play-publisher-15

fixes #15 - staged rollouts
fixes #17 - release notes
Merge pull request #18 from DavidHamm/google-play-publisher-17

fixes #17 - release notes
fixes #19 - change build result on failure
Merge pull request #21 from DavidHamm/google-play-publisher-19

fixes #19 - change build result on failure
fixes #22 - make builds possible on jenkins slaves
Merge pull request #23 from DavidHamm/google-play-publisher-22

fixes #22 - make builds possible on jenkins slaves
fixes #24 - environment variables are not resolved in release notes
Merge pull request #25 from DavidHamm/google-play-publisher-24

fixes #24 - environment variables are not resolved in release notes
fixes #26 - add start and stop console messages
Merge pull request #27 from DavidHamm/google-play-publisher-26

fixes #26 - add start and stop console messages
release 0.3.0