[xort, xvm] fixed ALL memory leaks
[xvm] fixed memory leak due to incorrect lnot implementation.
[xvm] continue with leaks and GC...
[xvm] gb initial
[xort] try to fix some leaks...
[xvm] continue with jit x64
[xvm] initial thoughts about jit...
xbyak will be used as code generator
[xort] optimization in constant arithmetics
[xort] small optimization of the compilation speed.