Issue #26 Remove image trimmer chrome

Remove image trimmer apply, cancel, close buttons and title bar.
Issue #26 Add form elements above image trimmer

Add an input for URL and a button for uploading an image.
Issue #26 Link upload button to file uploader

Add event so that clicking on the 'upload' button triggers a file upload.
Issue #26 Show image from URL on blur

When blurring out of the URl input field, show the image in the trimmer
Issue #26 Clear url when upload is selected

Start tracking the source of the image in the controller.

Add a listener in the image trimmer choose view to clear the url
input field when source is not remote.
Issue #26 Make image parameters accessible by api

Remove image hidden input fields.

Catch all changes to image dimensions in a model on the top level controller.

Create api methods to get the image from the ImageTrimmer.

Have event form use this API instead of counting on DOM elements.
Issue #26 Save images by URL

Add a method to the event model to download images from a URL.

Add functionality to controller to process images from upload or URL.
Issue #26 Load images from URL before showing them

When the source of the image is a URL, load it before saying that it is ready.

Clear URL input field on new:image instead of new:image:ready
Issue #26 Remove new:image:load event

Unecessary event, have image trimmer dialog respond to new:image.
Merge branch 'master' into image_trimmer
Issue #26 Adjust border widths to true 4:3 ratio

Create new image trim border sizes so that it will crop to a 4:3 ratio
Issue #26 Intensify trim border, remove view model

Make the opacity of the image trim a bit more intense. Remove a view model which
was originally part of the plan for the image trimmer, but is not needed now.
Issue #26 Reset image trimmer on new image

When a new image is loaded, remove all coordinates from the previous image
and reset the slider to the middle.
Merge branch 'image_trimmer'