user expects to attach/update screenshot to a requirement using filepicker
* using filepicker in proof forms
* extract proof form partial for new/edit views
* adding page header for new/edit views
* don't break Demeter's Law
* partial fix for specs, pending specs for new/edit
* display current proof image in edit page
* title for current image, moving out form container
* apply twitter bootstrap to proof form buttons
* preview attached image in new proof form
* extracting current proof image in a partial
* fix current image proof for edit proof form
* restrict services for filepicker to computer only
* adding httparty
* removing old image file when updating proof
improve IA of attach/update proof pages

* increased size of file picker image
* re-arrange order of proof form buttons
* changes to instruction copy
remove top level question that doesn’t need a proof
Merge pull request #40 from akshatpradhan/attach-image

user expects to attach/update screenshot to a requirement using InkFile