Overhaul to version 0.91.

This is a demo and proof-of-concept.  Add a new patient, enabled
eye_mag form. Add 2 encounters.  Look for Easter Eggs!  They make it
intuitive for an eye doc…
Work ongoing.  Enjoy the sandbox server.
This commit:
Conform to openEMR conventions:
sql binding, proper escapes, translation capacity…
Draw program: saves user drawn images by encounter.
Moved sketch.min.js into library with license (MIT) info,
still in eye_mag too.  Not sure why it doesn’t work from library/js.
PRIOR exam data works after second encounter added…
Cosmetic bugs to be addressed.
PRIOR draw/sketches not implemented yet.
More to follow.