Merge branch '25-char-sym-gc' into 26
implement save of last binding found in a sym
Merge branch '26-sym-binding' into 27
take out special avoidance of findVarInFram3 in findFun
Merge branch '26-sym-binding' into 27
split findVarInFrame3 to make simple case low-overhead (we hope)
Merge branch '26-sym-binding' into 27