Remove unused distros from Assetfile.

This takes `rake dist` from 25 seconds to 13 seconds.
Merge pull request #4455 from rjackson/remove-stupid-crappola-from-assetfile

Remove unused distros from Assetfile.
Speed up sendEvent by using direct function calls and `call` instead of `apply` where possible
Revert "Remove unused distros from Assetfile."

This reverts commit 247c9d0ecaa00b398eb0112c6ce1e326903ecaa3.
Merge pull request #4456 from rjackson/revert-removal-of-distros

Revert "Remove unused distros from Assetfile."
Use newly added `apply` and `applyStr` helpers elsewhere. Also minify them so they're inlined.

Breakdown of arguments length while running the Ember test suite:
{0: 444966, 1: 62482, 2: 23473, 3: 14270, 4: 3000, 5: 755}
Fix case where args isn't passed

Scumbag @ebryn didn't rerun all the tests before pushing
Revert "[FEATURE composable-computed-properties] Composable Computed Properties"

This reverts commit f34661cb86d1c359fdc2b1cc1b746c649b97e216.

Conflicts:
	features.json
	packages/ember-metal/lib/array.js
	packages/ember-metal/lib/computed.js
	packages/ember-metal/lib/enumerable_utils.js
	packages/ember-runtime/tests/computed/compose_computed_test.js
Remove unreachable return from blockHelperMissing helper
Merge pull request #4457 from joliss/unreachable-return

Remove unreachable return from blockHelperMissing helper
Fix observer related docs so they show up on the website
[FEATURE query-params-new] Hopefully final iteration

- default value'd QPs no longer show up in URL
- default value's type is used to determine how
  deserialized QPs are cast into controller prop values
- added queryParams Route config hash with properties
  `replace` and `refreshModel` to configure changed
  QP property behavior
- better code organization

/w @raytiley's help