chore(benchmark): add underscorejs lib
feat(benchmark): add ability to profile memory usage per iteration
chore(benchmark): reduce code duplication with updateTimes()
chore(travis.yml): enable g3v1x, disable g3v1x-master
fix(scope): remove deprecation warning for scope.watch with context

This was added in e8a5ce734b00fd22f700e2fc1be5507dda195638.
We will be looking into this some more.
feat(Scope): Instrument Scope to use User tags in Dart Obervatory
Reafactor