P0-B1: Part 1056: Improvements, Debugging

I have made extensive improvements to the inventory and gui systems.

I have improved the way that “stackable” items, such as ammunition magazines, etc, work.

I have also improved the way that items are equipped and dequipped between the inventory and the equipment slots.

I have also added more information to the gui menu, and I have added the ability to store ammunition separately from magazines, so it is now possible to store partially full magazines.

Full magazines will stack (So one inventory slot can be used to contain multiple magazines) while partially full magazines will not, and will eat occupy their own individual inventory slot.