Catches exceptions thrown by CLI functions
allows adding hosts without an automatically generated IP address
Some clarifications
removes node ordering when adding a link
interface errors should fail mininet
raise exception when no prefixLen is set
Do not resolve addresses
Merge branches 'feature/hostautoip', 'feature/moremessages', 'patch/catchexceptions', 'patch/intfpaircmd', 'patch/linksorted' and 'patch/netstatnumeric' into devel/mp
Merge branch 'master' into devel/mp
Additional IP addresses
Loss fix