reads a char into dl and a char into dh
shift dh left 4
char left in al instead of moved to dl, also values in dh and al are ored into al
Merge branch 'get-arbitrary-bytes-from-user' into develop
set up 510 iteration loop that writes modified user input to memory, followed by boot sig
some cleanup and converting 00 00s to 90 90s
memory written to boot sector of fdb
Merge branch 'write-user-input-to-boot-sector-of-fdb' into develop
'w' writes to disk, 'q' aborts

Does not fill all 512 byte if a 'w' is typed. 'w' and 'q' must be
first character in pair to be checked as commands.
fixed writing boot sig when 'w' pressed
Merge branch 'write-to-disk-on-w-abort-on-q' into develop
cleaned up Makefile a bit
updated README.md
Merge branch 'release-0.1.0'