refactored addons folder structure
updated missing addons in themes
grunt build + add ons tests updated to new structure
grunt cleanup
cleanup
grunt file updated
updated add-on discs
grunt file updated
fixed add-on paths in docs
Merge branch 'master' of github.com:uikit/uikit
updated dists
updated docs - addons
Merge branch 'master' of github.com:uikit/uikit

Conflicts:
	docs/addons_form-file.html
	docs/addons_placeholder.html
	docs/addons_upload.html
	docs/css/uikit.docs.min.css
default drag over class changed
Merge branch 'master' of github.com:uikit/uikit
updated docs - addons
Merge branch 'master' of github.com:uikit/uikit
default drag over class changed
Merge branch 'master' of github.com:uikit/uikit
updated docs - add-ons