Merge pull request #7 from mknoszlig/master

Problem: can't send hello msg to remote machine.
Problem: need basic client and server stack

Solution: generate client and server from simple models.

- hydra_server.xml is the server model
- hydra_client.xml is the client model

Note, not yet tested.
Merge pull request #8 from hintjens/master

Problem: need basic client and server stack
Problem: need test framework for C code

Solution: hydra_selftest and script to build and run
Problem: need a server main program

Solution: hydrad
Merge pull request #9 from hintjens/master

Problem: need test framework for C code
Problem: need better README

Also, missed some files in last commit. :-/
Merge pull request #10 from hintjens/master

Problem: need better README
Merge pull request #11 from mknoszlig/master

Problem: client can just say 'hello'.
Merge pull request #12 from mknoszlig/master

Problem: unnecessary imports.