Adding HDDBusyGraph to widgets
Adding iface automatic detection for NetGraph (using /proc/net/route)
NetGraph - Updating iface detection
NetGraph - Fixing 'typo'
HDDBusyGraph - Refactoring
NetGraph - Hardening error handling
Merge branch 'netgraph_autoiface' into develop

Conflicts:
	libqtile/widget/graph.py
Merge branch 'hddbusygraph' into develop

Conflicts:
	libqtile/widget/graph.py