* Squash merge from branch `joel-fix-build-issues-and-broken-tests`
* Update `proto3-wire` and `proto3-suite` refs in `stack.yaml`
* Update `proto3-wire` and `proto3-suite` refs via `cabal2nix` for `nix` builds
* Remove `compile-proto-file` from the repo, as it is now available via `proto3-suite`
* Update `proto3-suite` ref in `stack.yaml`
* Update `proto3-suite` ref via `cabal2nix` for `nix` builds
* Update `proto3-suite` and `proto3-wire` gitrevs
* Regenerate Echo and Arithmetic example modules from their respective .protos
* Fix typo
* update for reorganized headers in gRPC v1.1: https://github.com/grpc/grpc/pull/7559
* update nix files
* rename all gpr_slice to grpc_slice since we can't be backwards compatible anyway
* use gRPC 1.1.4
* now compatible with gRPC 1.2.0
* use nixpkgs 17.03 to get protobuf3_2, newer proto3-* deps, fix some warnings
* another warning
This updates the `release.nix` to now correctly run the test suite. You can
now build and test `grpc-haskell` by running:
```
$ nix-build -A grpc-haskell release.nix
```
... and `nix-shell` has been updated, too, so that you can do `cabal`
development inside of a `nix-shell` by running:
```
$ nix-shell -A grpc-haskell.env release.nix
```
For people who prefer to use `stack` you can still just build the `grpc`
library by running:
```
$ nix-build -A grpc release.nix
```
... then pass that library as input to `stack`
