prevent component caching
send exif date to client

this will be useful for ordering images by datetime on the client side
new plupload image presentation
utf8
style adjustements
modal should signal when being closed

we make sure to destroy plupload on clicking cancel and when escape key is pressed
mobile display
prevent unwanted scrollbars on entry list when not inside modalbox
plupload and modalbox resize
correctly display files refused by plupload

file can be refused if they have a bad extension, or are too big
and cannot be resized (gifs & svgs)
image upload design
correctly count selected categories
ie8 fixes for plupload
ie8 has problems with input events, let's simly use an interval
various fixes for plupload/mixitup

- ie8: click on labels won't happen if they are not displayed. And we should keep dropdown open
- ie8: don't use opacity on dropdowns buttons, alpha pngs get screwed
- don't load dropdowns js for mobile version
upgrade to plupload2

build process is not easy (requires node & such) but it could be useful to build a smaller version of the lib (without silverlight or html4 support, for example)
adapt size filter and resize behaviour to new plupload version
make modal much more fluid with ie8

- remove unnecessary filters
- general sibling selector was very slow with ie8 (sometimes applied after severall seconds or not at all)
Merge branch 'master' into image-upload-presentation
incorrect id