Envjs envjs

cleanup thread/sync code and one location issue

1) Binds rhino sync to the generic sync (like a java sync call)
2) Allows for the call of protocol when no location has been set (used by qunit and others)
3) Removed timer code that went into window (and will probably move ...)
4) use rhino spawn function instead of creating a thread manually (give rhino a chance
to setup the thread; not sure how much is necssary, but this code is a step towards getting this
generic ...)
http://github.com/thatcher/env-js/commit/aa066b695ae60cb4cfb45f7ddf...