Add specific support for vagrant-hosted remote commands in backend invoke.
Support redirect port in user-login command
Revert "Add specific support for vagrant-hosted remote commands in backend invoke."

This reverts commit 40e15ab7854672ce9f0bd30dbc46ca7f338c4f32.
Document --redirect-port option on browse command.
Merge pull request #739 from greg-1-anderson/vagrant

Add better support for directly calling remote sites running on vagrant / virtualbox