Add tests for Document.getElementById().
Merge pull request #1007 from saneyuki/get_element_by_id

Add tests for Document.getElementById(); r=Ms2ger
Fix PointerEvent testharness.js reference
aliasing gzip module correctly to make helper file work
Merge pull request #1114 from w3c/hallvors/gzipfix

aliasing gzip module correctly to make helper file work