Merge remote-tracking branch 'origin/wip-server-protocol' into wip-server-functionality
Begin hooking API server up with retcon

Begin integrating the server API code with the existing retcon
processing code.

Remove the Handler typeclass from the Network code, as the Server does
dispatch using case analysis and type safety is enforced by the GADT
instead.
Delete some code:
Merge remote-tracking branch 'origin/master' into wip-server-functionality
Merge pull request #92 from anchor/wip-server-functionality

Integrate RetconHandler monad into API server