* Revamp issue and pull request templates, other docs tweaks
`yarn test` now runs all of our tests.
* Remove generated files from the repository
* Update to new Signal support URL
* Prevent the 'Test failed 2 == 1' from test-release in CI
* Another attempt to fix grunt test-release on Appveyor
* grunt test-release: Fail build if test fails
* Lint fix, and move jshint earlier in CI process
