Rename argument  (#426)

Rename --enabletun to --userspace

adding map for commands that require/dont require tunnel to avoid che…

fix: quit runwda when wda dies (#389)

With this changes ios runwda will exit with error when WDA app dies (e.g. killed with ios kill, killed manually with AppSwitcher, or when iPhone is turned off).
dtxConnection's BreakdownCallback is implemented with Functionals Options Pattern, so it's fully optional and shouldn't affect any other dtxConnection usages.