Document the use of {{#with a as b }}
Added Asynchronous Routing guide

Also added a page on aborting/retrying transitions
Merge pull request #673 from machty/async-routing

Added Asynchronous Routing guide
Added caliper.io to the ember-users list
Merge pull request #692 from chancancode/caliper

Added caliper.io to the ember-users list
Documentation on sendAction()
Subject-verb agreement
Small guides tweaks
Simplify routing example
Example styling
Disable cookbooks for now
Call out URL explicitly
Update examples to latest Handlebars idioms
Add more whitespace to bottom of page
Make gravatar component use email field

(thx @matthewpearse)
Fix deprecation warnings
Use jQuery 1.X for IE < 9.
Merge pull request #699 from rjackson/allow_ie_8

Use jQuery 1.X for IE < 9.
Add Basho as a user.
Merge pull request #700 from seancribbs/add-basho-user

Add Basho as a user.