fix computations for rest parameters
fix calculation for environment size for envr instruction
add test cases for various uses for envr instruction
envr instruction implemented
menv instruction tested
make menv instruction set TARGC(thr) just as apply would
imenv and is have been tested
make consr actually cons in reverse
remove spl instruction
removed spl instruction
removed spl instruction
removed spl instruction
test for consr
change calculations for continuations
compute absolute offset of continuation target based on relative offset from instruction
apply, ret, and cls tests
virtual machine instructions all tested