[DOC] Correction for `ActionHandler` implementing classes
fixed run.bind to keep the arguments from the callback.
[FEATURE ember-metal-computed-empty-array] Enable by default.
[FEATURE ember-runtime-test-friendly-promises] Enable by default.
[BUGFIX] Add `which` attribute to event triggered by test helper
fix run.bind tests
fixed variable name
removed unnecessary obj and value since all we need is to check the arguments
fixed function instead of var syntax error
fixed forgotten target
fix doc typo
Merge pull request #4539 from denisnazarov/patch-3

fix doc typo
[BUGFIX beta] Throw error on `Maximum call stack size exceeded`
ES6 ember-handlebars & ember-handlebars-compiler: 1.
ES6 ember-handlebars & ember-handlebars-compiler: 2.
ES6 ember-handlebars & ember-handlebars-compiler: 3.
ES6 ember-handlebars & ember-handlebars-compiler: 4.
Merge pull request #4537 from trek/es6-handlebars

Es6 handlebars
[BUGFIX] Ember.copy now supports Date
Merge pull request #4545 from ghempton/date-copy

[BUGFIX] Ember.copy now supports Date