Implement the robot-js memory helper functions

[dkrutsko]

The robot-js library has some neat memory helper functions which would benefit from being included in this library. While originally there wasn't much sense to implement them in C++, their usefulness in the JavaScript library has made it obvious that having them in C++ would be a great idea. The following functions are being considered:

readInt8	writeInt8		readBool	writeBool
readInt16	writeInt16		readStr	writeStr
readInt32	writeInt32		readReal32	writeReal32
readInt64	writeInt64		readReal64	writeReal64
readPtr	writePtr