rewrote mem_master
Merge branch 'master' of github.com:hpsin/EECS314

# By castelazs (2) and others
# Via Dave Jannotta
* 'master' of github.com:hpsin/EECS314:
  Fixed add.s (mult to mul)
  switched back to mem_master from mem_loc
  Convert 16th notes to time ticks
  Add stores pure MIDI in MIDI_ON, MIDI_OFF
  Cat prints out only zeroes
Merge branch 'master' of github.com:hpsin/EECS314

# By hpsin (4) and others
# Via Devin Schwab (3) and hpsin (1)
* 'master' of github.com:hpsin/EECS314:
  Add converts ff etc to actual velocity value
  command history is working
  Fixed add.s (mult to mul)
  switched back to mem_master from mem_loc
  Convert 16th notes to time ticks
  Add stores pure MIDI in MIDI_ON, MIDI_OFF
  Cat prints out only zeroes
  all dat 7 bit
  Hex is hard, EF you Diego
  command history almost working
  Created a circular buffer for printed string values
Merge branch 'master' of github.com:hpsin/EECS314

# By Devin Schwab (1) and Robert S Meyer (1)
# Via Devin Schwab
* 'master' of github.com:hpsin/EECS314:
  Changed play to use new timings in 16th notes
  Updated some save header stuff
removed all the junk from mem_master and rewrote play
Merge branch 'master' of github.com:hpsin/EECS314

# By Dave Jannotta (1) and others
# Via castelazs (2) and others
* 'master' of github.com:hpsin/EECS314:
  Updated readme to reflect 7-bit stuff.
  Added patch headings
  duration is printed out for cat
  Other than the duration, cat works
fixed play