Reverse sort based on priority of flows so flows are displayed with the higher
priority first.

Some documentation added for functions
Merge branch 'master' of https://github.com/ramprackash/ryu

Conflicts:
	ryu/app/AdaptiveIDS/dp_filter.py
	ryu/app/AdaptiveIDS/ids_main.py
	ryu/app/AdaptiveIDS/lp_filter.py