Support importing of Hybrid Mobile projects into workspace

Currently, to import a Hybrid Mobile project, I need to import it as a plain Eclipse project, while ensuring that the original Eclipse project file (.project) is present that contains the desired project natures.

If the .project file is disallowed in version control, then this becomes a bit tricky since the .project file needs to be recreated.

It would be better to allow support for importing an existing directory into the workspace as a Hybrid Mobile project (like importing existing android project, existing maven projects etc.) via the Eclipse Import menu.