Remote vec type and arguments to main function eval
Shorten value_t definition
Move compile_value to seperate function
Add `NativeRef` type in LibJIT bindings and generalise native pointer wrapping and unwrapping
Add `insn_of` method to LibJIT wrapper that shortcuts the Compilable trait
Add jit::Type::from method which converts a generic parameter into a JIT type
Add more verbose messages to interactive mode
Use debug macro instead of verbose flag
Remove leftover print from debugging