Add rope_open_project as variable

[mcepl]

Hi,

I use ropevim with the project.tar.gz plugin. It would be great to switch to the current ropevim project by saying let rope_vim_project = "/path/to/project" instead of having to execute the RopeOpenProject command.

Thanks,

Kevin

[mcepl]

I don't see what is the expected value from this solution. Closing, if it means anything to anybody, please, reopen with proper description.