* rework folder uploading
- flatterns hierarchy on folder upload
- performs a single traversal for the entire folder heirarchy and ends with a comple file list
- allows now dropping folders on existing folders
- overall code improvements
* fix unit tests
* readme updates
* clean old and unused code
* code cleanup
* limit concurrent uploads
* update code as per review
* fix upload button for Safari
* fixes for Safari
- Safari compatibility
- code updates based on review
* fix code
* fix unit tests
* upload feature rework
lots of improvements for upload dialog and underlying services
* readme update
- readme cleanup
- remove some old comments from code
- update readme with new events for Upload Service
* restore prerequisites section in readme
[ADF-610] upload cleanup
- more strongly typing
- api improvements
* Upload cleanup and api improvements
- remove old unused settings (formFields variable)
- individual options for uploaded files (i.e. versioning)
- upload button and drag-and-drop area now set individual settings for file versioning
* exclude hidden files from upload
