add --note option to fix issue #56
add fail-mbr/Makefile.am to pass prefix to new makefile which note from Fisiu
(https://github.com/Thomas-Tsai/partclone/commit/cc5b6545bccd60f567d49944d7d9c36e0f4fc74b#commitcomment-8413428)
fix issue #57 and use PKG_CHECK_MODULES to check version