Speed up watching

On my Linux, it's not using inotify for some reason -- perhaps some
issue with the gaze package (https://github.com/shama/gaze). We should
be using inotify eventually, but when we're not, we still want to be
fast. 20ms polling interval on a 100ms build step seems alright. (That's
100ms without spawning, which we can't disable quite yet though --
https://github.com/stefanpenner/ember-app-kit/pull/287#discussion_r7433842.)
Merge pull request #287 from joliss/watch-performance

Speed up watching
Update README.md
fixing license
Merge pull request #289 from twokul/master

fixing license
fix ember-cli link
Merge pull request #291 from bradoyler/patch-1

fix ember-cli link
restore testing routers location to none
include a useful RSVP on error configuration by default.

Should increase visibility to crazy issues
make jshint happy
add keyEvent test helper to the test jshintrc
Adds gzip compression.
Merge pull request #294 from dsawardekar/feature/add-gzip-compression

Adds gzip compression.
Bump polling interval to 100ms again

As long as we are using spawn, it won't not make much of a difference
because we're slow anyway, and I don't want bug reports complaining that
EAK fries people's CPUs on some systems.
Fix race condition
Merge pull request #295 from MajorBreakfast/patch-1

Fix race condition
fix minor typo in comment
Merge pull request #297 from george/patch-1

fix minor typo in comment
prefer yehuda's (slightly modified) loader.js

circular references in almond are broken
Fix the path to the assets directory so the coverage metrics are reported correctly