[benchmark] add files for speed tests
[benchmark] use benchmark.js instead of jslitmus
[benchmark] add crude results display method
[benchmark] test open, _on_expand, and init
[benchmark] add _open and _close so they can be tested individually
[benchmark] test the remaining functions
[benchmark] hide pg elements while running tests
Merge branch 'benchmark' into idempotence

Conflicts:
	dist/js/pageguide.min.js
	js/pageguide.js