remove {{debugger}} from test template
remove already deprecated internal functionality
disallow container registration if the corresponding singleton lookup has already occurred
Conflicts:
	packages/container/tests/container_test.js
[BUGFIX beta] Allow a reduceComputed to have an undefined initialValue.

- Stop `ReduceComputedProperty.prototype.initialValue` from asserting
  that a reduce computed's initialValue must not be undefined.
- Modify `Ember.reduceComputed`'s assertion that initialValue be present
  to check that the initialValue is in options instead of isNone.
- Add a test that relies on an undefined initialValue to pass.
- Add a test that an error is thrown when you define a reduceComputed
  without an initialValue property.
Use plain ASCII for License.
Decamelize handles strings with numbers
Fix one failing IE 6/7 test - Issue #3525
Fix another IE test issue - Issue #3525
Comment out unenforceable `run.later` ordering tests

Fixes #3526
Comment out more unenforceable `run.later` tests

Fixes #3522