Moved auth_type and privacy_type

Moved auth_type and privacy_type to SharedCRedentialSummary Class
Removed cred.auth_Type and cred.privacy type

Removed cred.auth_Type and cred.privacy type from self.from_json
Update shared_cred.rb
Merge pull request #77 from gschneider-r7/master

include engine scope attribute in list_engines
Merge pull request #75 from krankin-r7/master

Removed attributes from from_json method
Bumping version number in preparation for release.
Remove 'rex' (we just need librex), add Brandon