added support to marking surrounding form as dirty when image is dropped. this change requires the file-dnd is inside a form.
coffeescript update
Merge pull request #7 from ajwhite/feature/form-dirtying

Feature/form dirtying
readme & version updates
readme & version updates, form API used for $setDirty
updated versions according to semver
further investigation found that the "?" flag in the require attribute makes the parent optional. This has been added for BC and version minor updated
Merge pull request #8 from ajwhite/feature/form-dirtying

Setting form dirty when dropping a new image
updated versions
Merge pull request #10 from ajwhite/chore/versions-and-tags

Version updates