lua_State is not preserved across runs and account userdata is not converted into
Lua values. All this allows us to do is manipulate the number of tokens
in each account and DoS the Fullnode with those three little words,
"repeat until false".
Why bother? Research. rlua's project goals are well-aligned with the LAMPORT runtime.
What's next:
* rlua to add security limits, such as number of instructions executed
* Add a way to deserialize Account::userdata OR use Account::program_id
to look up a metatable for lua_newuserdata().
