Make combined-reporter a built-in reporter
Publish Leadfoot deprecation messages in Intern

Leadfoot and Intern use different dojo's, so messages have to be pulled
from one to the other.
Fix Leadfoot compat test
Fix sourcemap self-test
Move support files into support folder
Merge branch 'master' into geezer
Add Intern 1.7.0 patch for self-tests

The patch updates Intern 1.7.0's lib/args module to properly handle
array arguments. It should be removed when we switch to Intern 2 for
self-tests.