Remove or fix broken links
rearrange unit-testing basics and ember-qunit

previous order introduced ember-qunit, then didn't use it in the next
section on basic testing. put Ember.Object unit testing basics first,
then introduce ember-qunit.
Make the andThen discussion read better

There was some duplication with the prior paragraph and it didn't read very well. Also, the example wasn't explained. As this is the first example I think it pertinent to give it a thorough explanation.
Update test-helpers with promise-sequence info

Add missing explanation around the fact that the async test helpers are called in a sequenced chain, each one after the previous one, and only after they've each completed in call order.
add redirect for previous testing/unit page
[DOC] Teardown test callback should reset application
Merge pull request #1471 from ppcano/doc-test-reset-on-teardown

[DOC] Teardown test callback should reset application
[DOC] [BUGFIX master] Fixes #1470

Remove unused component in JSBin.
update Kris Selden Github link
Merge pull request #1473 from mikepmunroe/change-kris-selden-github

update Kris Selden Github link
Update handling-metadata.md

Update the docs around metadata to explain how to retrieve it from a PromiseArray resulting from a query.
Merge pull request #1474 from danlucraft/patch-2

Update handling-metadata.md
Use 'self' instead of 'this'
Merge pull request #1475 from Dani723/patch-1

Use 'self' instead of 'this'
Fixes typo in Authoring Adapters section of website.
Merge pull request #1476 from abrinkman/master

Fixes typo in Authoring Adapters section of website.
Fixed ambiguity between template and controller.
Merge pull request #1477 from eneiand/patch-2

Fixed ambiguity between template and controller.
record ids are not globally unique
Merge pull request #1479 from eneiand/patch-4

record ids are not globally unique