* remove parent ptr from unregistered calls -- unneeded
* begin unregistered high level server loop
* undo changes to highlevel server, add mkConfig for unregistered server
* move call CQ create/destroy into call create/destroy
* async normal call function
* preliminary unregistered server loop for non-streaming methods
* working unregistered highlevel example
* loop counters for benchmarking
* changes for benchmarking, add ruby example server for benchmarking
* async version of withCall, refactor unregistered server loop to handle all method types
* unregistered client streaming
* add remaining streaming modes
* unregistered server streaming test
* unregistered streaming tests
* add error logging
* fix bug in add example
* remove old TODOs
* fix bug: don't assume slices are null-terminated
* add TODO re: unregistered client streaming functions
* initial echo client/server examples
* registered and unregistered versions of the example client
* ignore pyc files
* cpp echo code, flag to build examples
* threaded server example
