Broken dist build paths when collecting shared packages in workspace

[DavidVujic]

I think that this need some more work. When building, the dist will contain code that are in separate folders and that will probably not work when installing the build code as a dependency (entry point, imports that are one level only).

A possible solution:
The BuildIncludeFile.relative_to_source_root could return a custom path for the workspace scenario
Pull request #6

[DavidVujic]

Solved in #6