This allows to use the built-in lua "require" function with our file
system. This will help organize complicated scripts and it will also
allow to use libraries which were designed for this system.
To enable this change, this includes a new mechanism which allows to
load scripts from the default file system so that the files don't need
to be included in every mod. The default files can be overridden by a
mod if a special mod-table option has been set, similar to how external
shaders are handled right now.
As described in #1278, the current scripting system has issues with
handling non-trivial C++ types. Since fixing that deficiency is too much
work, especially since we are in a feature freeze, I decided to simply
enforce the usage of trivial types for scripting handles. Fortunately,
only two handles used non-trivial types so it was relatively easy to fix
those instances by dynamically allocating those and only storing the
pointers in the lua memory.
This fixes a bug in JAD-XA where the game would crash at the last boss.
Also, I noticed that the HudGauge handle used a copy of the hud gauge
rather than a pointer to the actual instance so I'm pretty sure that any
scripting changes to a custom HUD gauge simply didn't work before.
asarium