Merge pull request #291 in ZP/z-push from feature/ZP-969-implement-webservice-api-calls-to to develop

* commit '53288c05':
  ZP-969 Update copyright year, unset several variables together.
  ZP-969 Announce WebserviceInfo command, add command to mappings, remove include in WebserviceDevice, implement StripData() in SyncObject, run parent mapping twice in GetHierarchy() to fetch missing parent mappings.