Use pkg-config for libmtp
Change "fuse/fuse_foobar.h" to "fuse_foobar.h"

Note really sure why this is necessary-- might be a bug in my build
environment.
Switch fdatasync to fsync

FIXME: check in configure if fdatasync is available, and pick
accordingly
Include <ctsdlib> when needed for malloc
Update generic prose in autotools INSTALL