Fix issue with relative import when using single header file import.
  -- The commit propagates the package option to the newly create
     module node so it is recognized by SWIG
  -- Added a relativeimport test for this combination
     (in lack of py3 I was not able to test it with py3 but it
      "should just work")
Fix bug 206 where package information for relative in single file import is not propagated correctly.
Small fixes to the relative import fix.
  -- Now the tests actually runs
  -- Corrected the syntax for the fix in the yacc file
Merge pull request #207 from johan-hake/johanhake/fix-206-swig-relative-import

Fix issue with relative import when using single header file import [Python]