Upload image size information

[mjumbewu]

Feature Description

Determine the size of an image and upload with the attachment. Works with openplans/shareabouts-api#37

This is going to be in the onInputFileChange method in place-form-view.

Steps to consider

• Research how to get the image size to send up
• Add the image size info to the attachment payload
• Identify templates for displaying attachments
• Apply image size information to rendered images

This feature is done when ...

• An image that we upload to the API has size information that goes with it
• We get image size information back for uploaded images
• Image containers don't jump to new sizes after image download