Framsticks

Made operator precedence more javascript-like

#include <cstdlib> needed for Emscripten for malloc()

Added #include <stddef.h> needed for Emscripten

Made util-string.cpp #include util-string.h even though currently not needed, and removed unused #include

Made operator precedence more standard: conditional (?:) and logical not (!)

Cosmetic (docs)

Initialized variables in all cases to make potential errors evident

Support for more operations in 2D

Removed unused field

Comparing with "None" using "is not" instead of "!="