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
Added emphasis to the Hint

Maybe because late/tired but I read the Hint exactly backwards — as such I made an error I may not have (and spent some time working it out). 

The added emphasis should save someone else the issue.
use correct bound propety

code and the example below should be similar
Incorrect JSON format shown for belongsTo relationship

The documentation for the chapter "Connecting to an HTTP Server" shows an incorrect JSON format for the belongsTo relationship.  Currently has the relationship in an "_links" property, but Ember Data is actually expecting the id for the user against the "user" property.
Merge pull request #908 from lindyhopchris/patch-1

Incorrect JSON format shown for belongsTo relationship
Add Oslo, Norway Meetup

Note: no image
Use meetup.com for ATX meetup

The meetup.com page seems to be kept up to date more than the website.
Add note to component definition guide
Merge pull request #911 from alexspeller/improve-component-docs

Add node to component definition guide
Remove debugging tips for using a record's stateManager
Adds Ember.js Puerto Rico Meetup
Merge pull request #913 from gcollazo/master

Adds Ember.js Puerto Rico Meetup
Merge pull request #912 from benmoss/removeStateManagerTips

Remove debugging tips for using a record's stateManager