Prevent using root as mount point for external storage

Doesn't Cut the top arrow from navigation

Show build number

Fix file uploads on Windows with SQL Server

fix overwrite host support and make the code a bit more readable

add new function to generate the human readable version string based on version, channel and build number

send the build number too to push the next daily build. This is needed for the new daily build update channel

Return plausible isReadable() default impl for ext storage

Also adjusted all ext storage backends to not override these when the
default behavior is expected.

When an ext storage doesn't implement isReadable(), always returning
true made the file scanner believe that the file exists and creates a
cache entry with the size zero.

This fix makes the default impl of isReadable() use file_exists().

Fixes #5940

This reverts commit 3488f0b7.

Incognito mode

set incognito mode for public.php calls. Because in this case ownCloud should always work the same way as if no user is logged in

add incognito mode, allows to hide my user ID. For example, this is useful to access public resources while a user is still logged in

Movie preview - use frame after 5 seconds

use relative paths to create images from a file. 

Add public API for \OC\Avatar

no user is logged in (e.g. public gallery share)

in some cases 1MB was no enough to generate thumbnail

Fixed path normalization to prevent dot dirs

Fixes #5981

Make working en_US.UTF-8 locale a hard requirement