GenericURI support for PZ-Owner and known PZHs

Added support, in the native code (and node.js wrapper) of policy
manager, for the following Generic URIs:

http://webinos.org/subject/id/PZ-Owner
http://webinos.org/subject/id/known

Jira issue: WP-332
Merge remote-tracking branch 'webinos/master' into WP-332
Merge remote-tracking branch 'webinos/master' into WP-332
GenericURI support for PZ-Owner and known PZHs

Added support, in the js code of policy manager, for the
following Generic URIs:

http://webinos.org/subject/id/PZ-Owner
http://webinos.org/subject/id/known

Jira issue: WP-332
Merge pull request #50 from smonteleone/WP-332

GenericURI support for PZ-Owner and known PZHs