rsvp 2.0.0.

Breaking: Sandboxes are no longer promises.  They still have promises.
`sandbox.then` → `sandbox.promise.then`.
Trivial use of jsframe to load oasis.js.html polyglot.
Split Oasis into modules.
First pass switch to using polyglot approach.
Build oasis.amd.js again.

Also don't assume `jsframe` is in $PATH.
Minor refactoring.
Don't connect ports until sandbox is ready.
Only run web worker tests if Worker is available.

Tests more or less pass in IE9.

The one failure is the requirements test that complains about the lack of
support for sandboxing.
Merge pull request #10 from tildeio/ie-support

IE9, IE10 Support.