Revert "mvn gitflow:release setting POM version to 0.4"

This reverts commit 0a937bd037d1cfeb77ced231ceab2fbb4c441288.
mvn gitflow:release setting POM version to 0.5-SNAPSHOT
Merge branch 'release/0.4' into develop
Use 0.3-SNAPSHOT of jgitflow.
Merge branch 'hotfix/0.4.1' into develop

Conflicts:
	pom.xml
Use new plugin api (allows annotations).
Refactor methods.
Better logs & errors.
mvn gitflow:release setting POM version to 0.5
Merge branch 'release/0.5'