himuesgallery 7.x-1.13-beta3

- #1380568 due to a hint from Reg i move the Configsettings from Top-Level to admin/config/media

- #due to hints from balder and others himuesgallery now has the possibility to work with user-dirs
in admin/config/media/himuesgallery there is an option to add a subdir after himuesgallery which name is
the User-Name or the User-UID. Some example:
- Base directory is "himuesgallery"
- User1-Name is "admin" - User1-UID is 1
- User2-Name is "andy" - User2-UID is 23
If you choose to use User-Name then basepath to gallery for User1 is "himuesgallery/admin" and path for User2 is "himuesgallery/andy"
If you choose to use User-UID then basepath to gallery for User1 is "himuesgallery/1" and path for User2 is "himuesgallery/23"
Third choice is "don't use". The behavior is like bevor. In former example the basepath to gallery for User1 and User2 is "himuesgallery"

- alphabeticaly sort CSS-Files if you create or change a gallery

- #1429214 because file_scan_directory has problems if filename begin with non-english-characters (korean, japanese, etc.) we have to do our own thing
Thanks to phdenis63 who found the misbehavior in Drupal 6 version of himuesgallery and help me a lot with testing.