deleted local JOSE implementation classes
added wrapper classes for JWE/JWS algorithms, switched client entity model to use and store them.
moved token classes to use Nimbus-JOSE
removed idtoken class, removed all jwe/jwt tests
remvoed idtoken repository that was never used
converted bearer assertion framework to nimbus-jose
patched userinfo view to use nimbus
reinstated signing and validation service
added provisions to bootstrap signing and validation service from config files
moved jwk/x509 publishing over to nimbus-jose (mostly)
assertion token granter moved to nimbus-jose
request object processor moved to nimbus-jose
added system default signing algorithm, converted token provider and enhancer to use nimbus-jose
extra constructors for algorithm wrappers
request object endpoint is a placeholder, cleaning out for now
client registration endpoint needs general rewrite to fit new spec.

Most of the problematic references will change with the rewrite, so this is a slapdash patch to make things compile for now.
patched unit test to new format
missed a little bit there
converted client filters to nimbus-jose
not entities after all