Prepare for 1.6.0 release
Align features

Conflicts:
	feature/src/main/resources/feature.xml
	itests/src/test/java/org/jclouds/karaf/itests/GreenQloudFeaturesInstallationTest.java
	itests/src/test/java/org/jclouds/karaf/itests/JoyentFeaturesInstallationTest.java
Align with latest changes in chef.
[maven-release-plugin] prepare release jclouds-karaf-1.6.0
[maven-release-plugin] prepare for next development iteration