Added coffeescript 1.6.3 support

- 1.6.3 is also now the default version
[maven-release-plugin] prepare release coffee-maven-plugin-1.4.8
[maven-release-plugin] prepare for next development iteration
Merge branch 'release/1.4.8'

* release/1.4.8:
  [maven-release-plugin] prepare for next development iteration
  [maven-release-plugin] prepare release coffee-maven-plugin-1.4.8
  Added coffeescript 1.6.3 support
  Added SourceMaps refference
  Added integration test and updated README.
  reserve sub directories
Merge tag '1.4.8' into develop

Rel

* tag '1.4.8':
  [maven-release-plugin] prepare for next development iteration
  [maven-release-plugin] prepare release coffee-maven-plugin-1.4.8