Merge branch 'master' of https://github.com/owncloud/core

Conflicts:
	.gitmodules
Merge branch 'master' of https://github.com/owncloud/core
Move all providers and results to 'lib/search'

This commit creates result types for all apps in owncloud/apps that had previously declared providers. It also updates these providers to work with the Advanced Search app and Lucene.
Add 'httpd/unix-directory' as an alias for icon linking
Modify OC\Files\View to allow searches to return all results when queried with '*'
Update OC_Search to work with Advanced Search app

Adds removeProvider() and allows for searching with only one provider.
Fix formatting
Add L10N to result action text