ChangeLog, bmove.c, ext2_io.h, ext2fs.h, rw_bitmaps.c, test_io.c:

ChangeLog, bmove.c, ext2_io.h, ext2fs.h, rw_bitmaps.c, test_io.c:
  ext2_io.h, ext2fs.h: Protect against being included multiple times.
  bmove.c: #include ext2fsP.h instead of "ext2fs/ext2fs.h"
  test_io.c (test_flush): Add a debugging printf when the flush method
  	is called.
  rw_bitmaps.c (ext2fs_read_bitmaps): If the bitmaps are already read
  	in, return right away.