added a new filter to deal with front end image thumbnail sizes. It levelerages the the user agent to try and intercept our browser early and then send them the right image size the first time. if it's no specified, then it will just serve the base smallest size. On top of which we also have the existing js that will upsize/downsize the image if you resize the window.
updated some instructions on how to deploy this.
Merge pull request #4 from scneptune/develop

Develop