Log Message:
Update to 5.0.0

* Change to 5.0 branch.

Changelog:
Version 5.0.0 March 14th 2013

    New design
    Restore deleted files
    New fulltext search
    Display names
    New photo gallery
    Improved calendar and contacts
    Improved bookmarks
    New documentation system
    Improved file cache
    Improved security checks
    Security hardening in templates
    Security hardening: Implemented Content Security Policy
    Better versioning of better autoexpire
    Extended external storage
    New OCS REST API support
    Improved apps management