Updated 0.3z testing script with fun stuff

Firing a weapon will draw a line displaying the bullet vector and one
displaying the camera vector (camera one isn't quite right yet)

Also contains velocity modifiers that will fling the player towards
where they fired. Results in teleport reports and health loss when used
on SS gamemode.
Increased the button/item limit.

Some errors were appearing on a server with quite a few saved
cars/boxes/tents so a default item limit increase is needed.