paths should be relative if inside of the OF directory

[ofZach]

this could be a setting in the settings.json, but we should convert any path inside the root of the OF location to relative to the root of OF. ie, if it's testApp in OF/apps/myApps the path should be

 apps/myApps

not absolute as it is now. this should be be possible with:

https://nodejs.org/api/path.html#path_path_relative_from_to

we could have a setting in settings.json if folks want to work with fixed paths.

If it's outside of the OF directory, I think it's better to use absolute paths (and even if we can, post a warning that the project is created relatively to OF location)