add arguments to md5sum

[ras-drive]

Args needed:

arg	desc
-c --check	read checksums from the FILEs and check them
-b, --binary	read in binary mode
--tag	create a BSD-style checksum
-t, --text	read in text mode (default)
-z, --zero	end each output line with NUL, not newline, and disable file name escaping
--quiet	don't print OK for each successfully verified file

preferably tests should be written for the arguments.