Add opts.watch test

because the upgrade to watchify broke things.
Update for new watchify version
Document events
Trying to get Travis to behave

stealing a trick from watchify’s travis config
Disable watch test on linux

watchify is completely broken on linux right now https://github.com/substack/watchify/issues/82 https://github.com/substack/watchify/issues/73
Merge pull request #38 from atomify/fixWatchify

Fix watchify