pass remaining love handlers through

Now I have touchpressed and touchreleased working!

The stack of these handlers is quite deep at this point:
  car.* -> on.* -> App.* -> love.*

But I feel like I have a good rationale for each of these:
  love.* - OS
  App.* - testable
  on.* - live-editable
  car.* - the shell

0011-on.initialize

@@ -1,4 +1,5 @@
 on.initialize = function()
+	populate_missing_handlers()
 	love.graphics.setFont(love.graphics.newFont(Font_height))
 	Line_height = math.floor(Font_height*1.3)
 	Line_number_padding = Line_number_width*App.width('m')

0111-populate_missing_handlers

@@ -0,0 +1,12 @@
+populate_missing_handlers = function()
+	for handler_name in pairs(love.handlers) do
+		if on[handler_name] == nil then
+			-- make it available to scripts
+			on[handler_name] = function(...)
+				if car[handler_name] then
+					car[handler_name](...)
+				end
+			end
+		end
+	end
+end