attempt to replace s3_direct_upload with dropzone.
disable upload on dropzone click since the user needs to be able to click in the textarea and enter text.
upload only occurs now on drag and drop.
initial attempt to use jquery.fileupload for uploading file to s3 from dropzone.
commited missing files.
close but still not working.
found a fix for s3 upload.
fixed s3 form helper.
removed s3_direct_upload gem as it's not being used.
some cleanup.
added the uploaded image url to the text area.
added a placeholder during the upload.
added the insertatcaret plugin to insert the image where the cursor is positioned.
pull request fixes.
Merge branch 'master' of github.com:TheGiftsProject/katalog into add_post_drag_n_drop_support

Conflicts:
	app/assets/javascripts/components/post_view.js.coffee
	app/views/components/post/_post_fields.html.haml
	app/views/projects/show.html.haml
post component is already render in comments.
reset the preview after posting.
Merge pull request #3 from TheGiftsProject/add_post_drag_n_drop_support

Add post drag n drop support