Merge #358

358: Remove all the IPC r=grovesNL a=kvark

Closes #146 
Closes #22

We have decided to use Gecko IPC for Firefox. `wgpu-remote` will therefore provide all the Rust glue that Gecko needs for client and server:
  - initialization/termination of client/server
  - ID management for the client
  - pass encoding blobs

In Servo, we'd need to enable `serde` feature of `wgpu-native` and potentially roll out a different remoting crate that would establish a protocol based on `ipc-channel`, as we wanted originally.

Co-authored-by: Dzmitry Malyshau <kvarkus@gmail.com>

.travis.yml

@@ -58,7 +58,7 @@ before_install:
 script:
   - cargo test
   # TODO: enable GL backend
-  - (cd wgpu-native && cargo check --features local)
+  - (cd wgpu-native && cargo check --all-features)
   - if [[ $TRAVIS_OS_NAME == "osx" ]]; then (cd wgpu-native && cargo check --features gfx-backend-vulkan); fi
   - if [[ $TRAVIS_OS_NAME == "linux" ]]; then cargo check --release; fi
   - if [[ $TRAVIS_RUST_VERSION == "nightly" ]]; then cargo +nightly install cbindgen; fi