Format everything and add rustfmt to travis (#951)

* Format everything and add rustfmt to travis

* Remove extern crate winit from examples and add force_multiline_blocks

* Format the code properly

* Fix inconsistent period in PULL_REQUEST_TEMPLATE.md

* Only run rustfmt on nightly

* Travis fixings

.travis.yml

@@ -45,8 +45,11 @@ matrix:
 install:
   - rustup self update
   - rustup target add $TARGET; true
+  - rustup install nightly
+  - rustup component add rustfmt --toolchain nightly
 
 script:
+  - cargo +nightly fmt --all -- --check
   - cargo build --target $TARGET --verbose
   - cargo build --target $TARGET --features serde --verbose
   # Running iOS apps on OSX requires the simulator so we skip that for now