Add gravatar icons to list screen

To enable, add gravatar: true to your email field in your model
Reimplement gravatar using underscore method

Added gravatar column mixin.
Email field template forked from Text template, adds image.
Email field underscore method gravatarUrl.
Change event added to public item.js.
Includes Joseph Myers md5.js for client side hashing on change.
Rolled back embedded crypto in the templates.
Updated docs.
Merge pull request #142 from mbayfield/master

Add try/catch for missing Pre-route middleware
Merge pull request #132 from mcauser/gravatar

Add gravatar icons to list screen
Implementing .env defaults for s3 config, fixes #143
Cleanup
Checking for cloudinary config when CloudinaryImage fields are initialised, fixes #28
Updating License for 2014
Implementing version in Admin UI footer, fixes #130
Updating packages
Updating moment and jade (warning: potential breaking changes!)
v0.2.0
Updating Changelog
Allowing MONGO_URI as well as MONGO_URL for env variables

For compatibility with various mongo connection standards
Added docs for Mandrill Service and fixed typo in README
Merge pull request #144 from jcope2013/master

Added docs for Mandrill Service and fixed typo in README
Adding nav item for Mandrill in docs
httpServer accessable
Merge pull request #148 from TheBenji/master

httpServer accessable
Implementing initial form for location fields #147