polish jslint for files-upload.js

Tags cleanup

fix folder icon (file had a big background rectangle before)

Be more strict in checking the resultCode of memcached hasKey function

* owncloud/fix-memcached-hasKey:
  Memcached hasKey should test for success, the get can fail for other reasons.

Fix sharing of ext storage mount points

One of the other failures is no running server.

Added extra code to handle the case of Oracle which saves empty strings
as null values.

Use strict type comparison

* owncloud/we-certainly-don't-want-type-juggling-on-that:
  Use strict type comparison

Fix issue with personal mount points and sharing

When sharing an ext storage mount point, it will now use the name of the
mount point instead of an empty string for the target path.

Type hinting fixes for sharing

[sharing] some small clean ups and bug fixes

Directory seperator is \ on windows
However we can just check for path != dirname(path) because that is
the same for '' (empty string), '.' and DIRECTORY_SEPARATOR on all OS

We certainly don't want to have type juggling on that.

Some expected Sabre exceptions are now logged with DEBUG level

Fix linkToPublic and linkToAbsolute.

[sharing] share updater ignore part files

Send URI instead of filepath to NGINX for X-Accel

fix enlarged caret on installation page

fix getUserFolder() of server container

Added ext storage app in autotest unit test run

Updated Owncloud Mailinglist URL

Dont create borders around previews when scaling up is disabled