Ln - Command line Hardlinks

- Docu update on --anchor and --destination - --probefs failed on unknown filesystems - ln reports error code when it fails creating hardlinks - Introduced a static version of ln.exe for use under e.g. WinPE - Changed the behavior related to cirularties. No error message raised, but circularity are broken properly. - Multisource aka --destination in combination with --mirror did not work. - Symbolic Link creation required admin even in developer mode. - Directories can be specified as destination with normal file or symbolic linking.