o = todo
X = done
? = maybe but not likely
M = more testing
I = in progress
W = waiting on other work

o	switch/case, for any type
o	break/continue keywords for switch() and for(;;)
o	native integer type
o	quaternion type
o	?: operator
o	<op>= operator ( var += expr, etc. )
o	pre- and post- increment operators (++ and --)
o	CSE optimisations