[Review] Request from 'vlewin' @ 'SUSE/connect/review_140630_extend_yast_wrapper_to_include_activated_'

Please review the following changes:
  * 284bb3c Merge pull request #124 from SUSE/review_140630_fix_status_call_regression
  * 42df4ae add product_activated? and system_activated? methods to the YAST wrapper class
  * 0d4c87b introduce activated? and adapt registered? method
  * 1bef3ed rename registered? to announced?
  * 509b9d5 Update package files
  * 2202147 Fix status call regression in case of free products

It only tells that to a user who understands the announce sequence in detail.  And what do we call "activated?" given that the SCC end of the activation may no longer exist or the subscription may have expired and the system may no longer be able to access the service(s)? "was_once_activated?"? It all gets complicated if we take all these cases into account.