Pink (my WIP lua ink compiler) support

[premek]

Closes #6

Hi, I see you added 'initial support for incompatible versions', please let me know if I can use it (or if I should make any changes in my PR)

I didn't include the update_site.yml file changes yet (should I?) but in my fork I run it with python3 proof.py pink_compiler pink_runtime

Another thing I wasn't sure about was that I store my compiled "bytecode" in a new file *_pink.lua.
I didn't have any file format for it as it's just a lua data structure passed from the compiler to the runtime.
So I serialized it to a lua file so I can easily 'require' (include) it in the runtime script but for that it needed to be called *.lua

I also found it useful to be able to display it so in my fork I changed the compileBytecodePath link. Would it be possible to somehow add the link to the pink.lua file too? (example: https://premek.github.io/ink-proof/#!/file/pink_compiler_I002_out_pink.lua?overview=ink )

Let me know what you think

thanks