2.13:

- remove all NFS code

- remove all FS detection code

- remove from all places direct calls of ioctl(BLKGETSIZE) and move it
  lib/blkdevsize.c: blkdev_get_size(), blkdev_get_sectors(), blkdev_get_pages()
  (see mkswap.c and fdisk/disksize.c)

- use EXIT_FAILED and EXIT_SUCCESS from stdlib.h for exit() codes

- build-sys:
	- add exampledir and example_DATA
	- add readmedir and readme_DATA