rename constants
add quota streamwrapper that limits the amount of data that can be written to a stream
move storage wrapper test to new namespace
add quota storage wrapper
fix getPermissionsCache for storage wrapper
add option to wrap existing mounts
use renamed constants
add conveince function to wrap all storages
use storage wrapper for quota instead of a filesystem proxy
use renamed constants
Fix some JSLint warnings
Fix a syntax error & have if-conds in an own line
Use JSON to send/receive group data.
Squashed commits from PR #4364 for master.
fix quota wrapper reporting negative free_space, breaking user interface

return 0 instead
remove outdated quota proxy
Merge branch 'master' into fix_jslint_kondou

Conflicts:
	apps/files/js/file-upload.js
Break long lines into smaller ones.
merge master in storage-wrapper-quota
adding file templates for ods, odt and odp
Merge pull request #4509 from owncloud/add-odf-templates-master

adding file templates for ods, odt and odp