all unit tests now pass under IE9

when we stopped exposing $location service on the root scope
the scenario runner was not modified to access the $location
service via $service

The following apis were affected:

- browser().location().hashSearch()
- browser().location().hashPath()
- browser().location().search()

apparently IE9 is one step closer to becoming a real browser by
treating xmlns-like ("foo:") prefixes in node names as part of the
node name.

fixes:
https://groups.google.com/forum/?lnk=srg#!topic/angular/TGdrV4GsL8U

succcess callbacks should be executed for status codes in the range
of <200,300).

sync caching in ng:view must be reverted becase ng:view uses
$route.onChange to listen for changes.

$route fires all onChange events before it calls $become(Controller)
which means that if the template being included via ng:view contains
ng:controller, ng:include or other widget that create new scopes,
these scopes will be created and initialized before the parent scope
is fully initialized (happens after $become is called).

For this reason ng:view must be async.

The new scope implemenetation will resolve this issue by providing
us with an api to register one-off tasks to be executed during the
flush phase. We'll be able to compile and link the included template
safely at this time.