Remove Handlebars related packages.

They are not used for building the project (as of 1.10.0-beta.1) but are
confusing to see (mostly duplicated) helpers in more than one place.
Cleanup trailing whitespace.
Merge pull request #10053 from rwjblue/trailing-whitespace

Cleanup trailing whitespace.
Validate indentation.
Merge pull request #10054 from rwjblue/validate-indentation

Validate indentation.
Merge pull request #9996 from rwjblue/remove-handlebars-packages

Remove Handlebars related packages.
Make Router.map callbacks invoke after application boot.
[FEATURE ember-routing-named-substates]

Only add loading and error substates if the resolver being used is a
modules based resolver.

Also, return the Ember.Router from `Ember.Router.map` instead of the
`router.js` router.
Merge pull request #9994 from machty/router-map-named-substates

[FEATURE ember-routing-named-substates]
[BUGFIX beta] Pass array to Ember.computed.filter callback
Merge pull request #9660 from gdub22/cp-filter-callback-array

[BUGFIX beta] Pass array to Ember.computed.filter callback
Cleanup binding integration test
Merge pull request #10058 from mmun/fix-test

Cleanup binding integration test
Cleanup view helper
Merge pull request #10059 from mmun/cleanup-view-helper

Cleanup view helper
[BUGFIX beta] Prevent mandatory-setter when setter is already present.
Merge pull request #10060 from rwjblue/do-not-setup-mandatory-setter-for-props-with-setter-already-defined

[BUGFIX beta] Prevent mandatory-setter when setter is already present.
[FEATURE ember-routing-named-substates] Enable by default.
[FEATURE ember-htmlbars-inline-if-helper] Enable by default.
Merge pull request #10064 from rwjblue/enable-feature

Enable features given 'go' on 2014-12-26.