merge rust-rendering-2 to master

restructuring

all planets, module attachment broke

fix multiple parameter functions. change panic when 0 arguments provided to running kabel

self-recursion works

functions act like variables

first draft of functions and calls

repo synchronization between computers

fizzbuzz works due to fixed bug with else if

fix error with null in file, fix error data in string token, add "but" to errors

break works, continue works-ish

break and continue added, but they dont clean up the stack

basic break and continue but it doesn't quite work

for loop desugaring and loops in vm

get through variables test

silly error, opcodes were wrong in opcodes.rs

variables

fix issue with not ppopping to clear stack with an expression statement

a few tests

run if statements