IDEA project generation fixups and enhancements

• Fixes an issue with GradleSettings in generated IPR file
• Adds ASL2 license header configuration to generated IPR file

Support pinning dependenciesVersion in spinnaker extension

Merge pull request #18 from cfieber/master

add dependenciesVersion to spinnaker extension

Release via Travis CI

Merge pull request #17 from cfieber/master

add build badge to readme