Moved the adding of images to the images resource on HTTP POST
No need to validate the image identifier in the URL since we don't have one when adding images any more
Updated events related to adding images. Also updated tests
Updated all related scenarios to use HTTP POST on the images resource instead of PUT on the image resource when adding images
Make sure the data returned from the required files are arrays before merging
Updated ChangeLog
Updated docs
Fixed a couple of comments
Merge pull request #161 from christeredvartsen/post-for-adding-images

Use POST on the images resource to add new images