[aquaria] Updating 3rd-party mods to the lua-changes branch syntax

[Andrew Church]

>Is there consolidated documentation anywhere on the changes required on the
>lua scripts to run with your devel branch?

All the information you'll need should be in Aquaria/ScriptInterface.cpp,
but the short version is:

- Add a line saying "v = getVars()" at the top of _every_ script.

- Prefix _every_ global variable reference with "v.".  (It's also okay to
  declare variables local if they're only used within a single block.
  The important thing is to not use global variables.)

- Declare _every_ non-interface function as local.  (Interface functions
  are init(), update(), etc.; see interfaceFunctions[] for a full list.)

- _Never_ make function calls (math.random(), etc.) at file scope.  Since
  Lua tables are actually references, this also means you can't declare
  tables at file scope -- initialize them to nil and assign a table value
  in init() instead.

  --Andrew Church
    achurch at achurch.org
    http://achurch.org/