Added vmStartAttach command and modified Makefile to rename the certificate
Added the VMStartAttach command that starts VM(s) and attaches directly to them. The correct helper command was added too.
The Makefile copies the certificate file into src/client/default/resources/ folder, keeping the same original name. When the file Defaults.go embed the certificate file, it requires it to be named ca-cert.pem, otherwise it fails compilation. So I modified the makefile to also rename the file while copying it.