SCRATCH: Home of concept/test programs

1. time_sync
   -time_sync_pll.c - A phase locked loop (PLL) algorithm for time
   and clock frequency offset syncronization between
   a master and slave.

2. tdma_sim
   -simulator.h - A simple framework for discrete event simulation.
   -tdma_sim.cpp - A TDMA MAC simulation with access point and remote(s).

3. protocol-stack
   -runtime-poly - An example of stack interfaces modelled as abstract interfaces using virtual functions
   -compiletime-poly - An example of stack interfaces modelled as abstract interfaces via CRTP