Merge pull request #3 from allegro/development

Release 0.9.1
Merge pull request #6 from allegro/development

resolving #4 and #5 - custom version sanitization
updated changelog and readme before release
resolving issue #7 - prdefined version creators
0.9.3 - updated readme
updated CHANGELOG
fixed link to mavne-release in readme
travis integration
Merge branch 'master' of github.com:allegro/axion-release-plugin
fixing travis install stage and adding travis badge
Merge branch 'master' into development