1. change the version from 1.0.1 to 1.1
2. add example of 'inveter-ring-oscillator'
	new file:   iro_ha.m
	new file:   iro_model.m
	new file:   plot_iro_perf.m
	new file:   run_iro_orbit.m
	new file:   run_iro_perf.m
	new file:   run_iro_simu.m
	modified:   ../../CHANGELOG
	modified:   ../../cra_cfg.m
Merge /ubc/cs/home/c/chaoyan/cra