Merge branch 'develop'

[maven-release-plugin] copy for tag groundy-parent-0.7

[maven-release-plugin] copy for tag groundy-0.6

[maven-release-plugin] copy for tag groundy-0.5

[maven-release-plugin] copy for tag groundy-0.4

[maven-release-plugin] copy for tag groundy-0.3

[maven-release-plugin] copy for tag groundy-0.0.1