Removes JSON marshalling for non-JSON types

This fixes a bug where request or response that are not objects would include functions to marshal and un-marshal.

API Path Decoding

Decode encoded URL raw path to support encoded path variables.
Example: organization.4df4b292-bb6f-4214-96a1-2b4b6665f122%2Cpractitioner.1f7b2f3d-ea90-4c60-9917-e0ab2cdff7d3 where %2C is an encoded ,

Updates to templates

Removes verbose error messages from param validations