JCLOUDS-292: Added CloudSigma2 ComputeService

* Added the ComputeService implementation
* Added the San Jose region
* Added the Honolulu region

Conflicts:
	cloudsigma2/src/main/java/org/jclouds/cloudsigma2/domain/DrivesListRequestFieldsGroup.java
	cloudsigma2/src/main/java/org/jclouds/cloudsigma2/domain/ServerAvailabilityGroup.java