v3.5.0

• Add tests and enable Travis (@rwaldron #32)
• --list learned to sort by name (@dilijev #34)
• Learned --edit: allows modifying --args or --tags of a host (@dilijev #36)
• Learned --unanimous, -u: exit(0) and print nothing if all hosts agree, otherwise exit(1). (@dilijev #35, @rwaldron #37)
• Use --config ... for test-safe configuration. (@rwaldron #43)
• Add appveyor support (@rwaldron #44)