allow luaget/luaset/luacall to access tables and methods, improve type conversion, add bl.string, begin adding matrix

src/util/std.lua

@@ -179,7 +179,7 @@ valueToString = function(v, tabLevel, seen)
 		return tostring(v)
 	else
 		--error('table.tostring: table contains a '..t..' value, cannot serialize')
-		return 'nil --[[ cannot serialize '..t..': '..tostring(v)..' ]]'
+		return 'nil --[[ cannot serialize '..tostring(v)..' ]]'
 	end
 end
 function table.tostring(t)
@@ -345,3 +345,6 @@ end
 function math.clamp(v, n, x)
 	return math.min(x, math.max(v, n))
 end
+
+
+print('  Executed std.lua')