add rambus ring oscillator circuit example
	new file:   rro/plot_rro_perf.m
	new file:   rro/readme
	new file:   rro/rro_ha.m
	new file:   rro/rro_model.m
	new file:   rro/run_rro_orbit.m
	new file:   rro/run_rro_perf.m
	new file:   rro/run_rro_simu.m
update document and iro example
	modified:   ../CHANGELOG
	modified:   ../cra_cfg.m
	modified:   ../doc/internal/perf_analysis_notdone.pdf
	modified:   iro/iro_ha.m
update document
	renamed:    perf_analysis_notdone.pdf -> report_cra_perf.pdf
update document and files

	modified:   ../../CHANGELOG
	modified:   ../../cra_cfg.m
	modified:   ../../doc/internal/report_cra_perf.pdf
	modified:   iro_ha.m
Merge /ubc/cs/home/c/chaoyan/cra