Update Redirecting section in Routing guide

 * The `redirect` hook is now deprecated in favor of `beforeModel` and `afterModel`.
Custom JSON Transforms : Update sample code

The 'registerTransform' method has been removed, and there is a new
way to register a custom JSON transform.
Add back and bring up-to-date filtering section in Redirecting guide
Add section headers to Redirecting guide
add a cookbook on displaying relative dates
Update to reflect example and new query syntax
Add guide for Handling Metadata
Add Ember(/Data) canary warnings
Fix overflowing links on api page
Add Oslo, Norway Meetup

Note: no image
Update the-view-layer.md

Combines two tables, listing native browser events, into one.
Changed hbs to html with script and template-name for clarification

It was confusing to have two unnamed example hbs-templates without context to clarify which is which.

As it's done in other parts of the documentation. I changed the hbs it to html and added <script type="text/x-handlebars" data-template-name="XXX" to clarify it.
Merge pull request #920 from steveklabnik/patch-1

Grammar fix in routes guide.
fix typo

see: https://github.com/rpflorence/ember-localstorage-adapter/blob/master/localstorage_adapter.js
Issue #924, fixed code example for computed.mapBy
- Fix: Code example misspelled the accessed property.
- Add: Updated 'childAge' to 'childAges'.
Merge pull request #925 from michaelBenin/method_computed_mapBy_code_example_fix

Issue #924 - fixed code example for computed.mapBy
Remove "Rendering Warning" information

This .assert was never written in a clear way that people
understood, so we removed it hoping someone would repost
the issue with steps to reproduce so we could write a better
message.

We never have. It appears the cause of this isn't common any longer.
Merge pull request #918 from nivoc/patch-4

Changed hbs to html with script and template-name for clarification
Merge pull request #923 from flada-auxv/fix_typo_of_using-other-adapters_page

fix typo
Merge pull request #917 from jehoshua02/patch-4

Update the-view-layer.md