A workaround for https://bugzilla.mozilla.org/show_bug.cgi?id=608735
In FF getAllResponseHeaders() returns null if the request is the result of CORS.
Tried to format the code so that when a FF patch is released and gains enough
traction it can easily be selected and deleted. Heavily inspired by jQuery's
patch for the same bug. This patch falls short of passing through custom headers
but covers all of the "simple response headers" in the spec at
http://www.w3.org/TR/cors/
This commit should get reverted once Firefox 21 gets out.
Closes#1468
Conflicts:
src/ng/httpBackend.js
this was never meant to be a public api used by apps. I refactored
the code to hide the functionality.
BREAKING CHANGE: $browser.addJs method was removed
apps that depended on this functionality should either use many of the
existing script loaders or create a simple helper method specific to the
app.
