Pass index into computed array callbacks
Document the Router.map function.
Replace multiline variable assignments.

* ember-handlebars
* ember-extension-support
* ember-debug
Merge pull request #5368 from wbyoung/document-map

Document the Router.map function.
Merge pull request #5369 from rwjblue/moar-multiline-fixes

Replace multiline variable assignments.
ember-router-handlebars single var with assignment
Merge pull request #5371 from rwjblue/asdf

ember-router-handlebars single var with assignment
Remove more multiline var declarations.
MOAR VARS
Fix last multiline vars statements in packages.

Searched using the regexp /var.*,\n/
[BUGFIX beta] sync route-recognizer

Fixes #4998
Merge pull request #5373 from machty/sync-recog-decode

[BUGFIX beta] sync route-recognizer
Merge pull request #5370 from cibernox/remove_some_multine_var_declarations

Remove even more multiline var declarations.
[BUGFIX beta] Fix active link to nested parent with query params

failing test of link-to helper with query-params;
make tests pass by checking for non-empty query params and isActive
Merge pull request #5109 from tpitale/link-to-nested-parent-query-params

[FEATURE query-params] Fix active link to nested parent with query params
[DOC release] Document Ember.DAG
Merge pull request #5353 from cibernox/document_dag

[DOC release] Document Ember.DAG
Merge pull request #5069 from aceofspades/patch-1

Pass index into computed array callbacks
[BUGFIX] The {{link-to}} helper should not transition if target is not equal to _self or empty
Merge pull request #5349 from dschmidt/notransitionontargetblank

[BUGFIX] The {{link-to}} helper should not transition for target=_blank