Adding initial Jackson 2 support for ToolConsumer & ProductInstance
Renaming lti objects, adding some Jackson test
Fixing build & adding bare minimum for deserialization
Adding Services + refactoring lti2 objects packages
Adding service class to sign LTI requests
Adding LTI service methods
Adding ToolProxy Jackson object
Adding context url
Adding ToolProxy jackson objects
Adding abstract interfaces for signing/verifying lti requests
Adding implementations of LtiVerifier & LtiSigner
Changing base_url_choice to a map
Adding JsonNodes to tcp and tp
Organiing packages
Merge pull request #4 from IMSGlobal/jackson2

Jackson2