* begin module with LowLevel tests of Op stuff, cancel functions, refactor Ops a little.
* refactor op tests, add server-side cancellation test
* add cancel function for unregistered calls, move some unregistered stuff
* remove unnecessary threadDelay
* update test description
* fix init metadata api for registered server calls
* pass call into handler for cancelling, add cancel test
* 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
* grpc_server_request_call
* basic slice functionality
* rename function to emphasize side effects
* add docs
* ByteBuffer function bindings
* replace unsafeCoerce with more specific function, add docs, tests.
* add newtypes for Tag and Reserved void pointers
* manually fix request_registered_call binding
* use nocode keyword to fix Ptr () problems
* decouple copying Slice from freeing slice
* Add time ops
* remove nocode decls
* Start Op module, fix c2hs preprocessing order
* metadata manipulation operations
* metadata free function, test
* helper functions for constructing ops of each type
* bindings for op creation functions
* finish up Op creation functions, implement Op destruction, add docs.
* tweak documentation
* rework Op creation functions to work with an array of ops, for ease of use with grpc_call_start_batch
* forgot to change return types
* wrap hook lines, fix types to op creation functions
* implement part of the payload test
* hideous, but working, end to end test
* bindings for connectivity state checks, split test into two threads
* various cleanup
* rename Core to Unsafe for emphasis, clean up tests more
* begin safe low-level facilities
* begin completion queue and server stuff
* Finish server start/stop, cq start/stop, add tests
* facilities for safely executing op batches
* reorganize LowLevel modules, begin explicit export list
* client functionality, stub payload test, various refactors
* tweak cabal file, add test
* add more documentation
* doc tweaks
* begin refactor to improve CompletionQueue safety
* export only thread-safe CQ functions, add registered call creation and other CQ utilities
* begin refactor to use GRPCIO monad, fix missing push semaphore, fix mem leak in server calls
* switch to explicit Either where needed
* add crashing tests, continue fleshing out serverHandleNormalCall
* fix haddock error, finish first draft of request handling function
* reduce GHC warnings
* non-registered client request helpers
* initial request/response test working
* don't pass tags around; generate where needed
* server call bracket functions
* correct order of semaphore acquisition and shutdown check
* simple debug flag logging, simplify Call type
* fix various registered method issues (but still not working)
* cleanup
* delete old code
* remove old todo
* use MetadataMap synonym pervasively
* more comments
* update TODOs
* tweak safety caveat
* docs tweaks
* improve haddocks
* add casts to eliminate clang warnings, remove unused function
* update options to eliminate cabal warnings
* remove outdated todo
* remove unneeded exports from CompletionQueue
* rename to GRPCIOCallError, re-add create/shutdown exports (needed for Server module)
* newtypes for hosts and method names
* more newtypes
* more debug logging
* Fix flag name collision
* instrument uses of free
* more debug
* switch to STM for completion queue stuff
* reduce warnings
* more debugging, create/destroy call tests
* refactor, fix failure cleanup for server call creation. More tests passing.
* formatting tweaks
