introduce the file_uploader plugin
wip: file_uploader
wip: dragover, prevent default must be on
wip: upload plugin to be there

next: extent to drop into feed
wip: most of the files are working

todo: some files not working for some reason
todo: clean up
add files through api.php using the new file controller
code clean up, ui clean up

todo: update wiki and icons
improve user experience
D&D behaves as expected

todo: fix all style and clean code
it is now possible to drag and drop without explicitely using the pluging

todo: fix style to highlight drop zone
wip
fix to behave like gmail
fix style

to do: gfx and wiki
update graphics

turn off interactive drag and drop plugin: user should use chris built in drag and drop
ready for merge - everything working and clean ui
Merge branch 'file_uploader'