New calling convention

[playXE]

We need faster and easier to use calling convention. For this purpose we have to know function stack size ahead of time (done in 0f5d078) and allocate memory on the stack (alloca-rs will be used). This way we get faster calls and easier JIT in the future.

Also I thought about precalculating catch stack size which will remove all the heap allocation that happens right now during call to JS.