more fixes to entities to match schema, CRM-14311

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* CRM-14311: Add metadata to doctrine entities
  http://issues.civicrm.org/jira/browse/CRM-14311
added more meta data to entities, also added API annotations, CRM-14311 CRM-14330

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* CRM-14311: Add metadata to doctrine entities
  http://issues.civicrm.org/jira/browse/CRM-14311
* CRM-14330: Add REST-related annotations to generated entities
  http://issues.civicrm.org/jira/browse/CRM-14330