Persistence

[SquidDev]

It would be nice to save the state of the Lua VM. This should be possible when executing Lua Closures, but we will need to support xpcall and pcall functions.

It would be nice to support LuaJC classes with something like these libraries. It might be possible to do something with JavaFlow

[SquidDev]

@timofonic This is mostly blocked by #12 (and me needing to do some research in how Eris stores its data).