commit Menu.lua as well as tests for HW and the lua interpreter
document Menu.lua a little
fix funny bug: ItemCB:init set Item's attributes and not self's
get rid of silly semicolons at EOL

I had 99 semicolons ending my lines but now there ain't one
update the lua interpreter example a little
swap left and right in selector
make use of menu in Sandbox
oops, I can't use my own syntax
fix two bugs in Sandbox menu: item weirdness and menu exit
declare function before using it
make exit menu actually work
hide menu on turn end or weapon switch
add event system, hidden/disabled items, change menu display code
make all gear types spawnable
make BBRW compatible with 0.9.19

it still needs an item update but at least it works now