* Create a Gradle task to run the test server
As an artifact of the old build system, the test server relies on having
the built registrar_(bin|dbg)*(\.css)?.js in place (see ConsoleUiAction
among others). As a result, we create a Gradle task that puts those
files into the correct, readable, location before running the test
server.
* Depend on assemble rather than build
* refactor gitignores
* Refactor the license check to be a generic presubmit check
This includes all of the old presubmits that were in our METADATA file
that are still valid.
* Responses to CR
Added docstrings, refactored the file finder, changed variable names,
and formatted the file
* More respones to CR
