mutabra #4 Migrate build system to Gradle

release plugin added
mutabra #4 Migrate build system to Gradle

release plugin added
mutabra #4 Migrate build system to Gradle

performRelease subtask added
mutabra #4 Migrate build system to Gradle

release plugin introduced
mutabra #4 Migrate build system to Gradle

release plugin improved
mutabra #4 Migrate build system to Gradle

release plugin version resolve strategies fixed