Set install dirs
Summary:
Correctly set the SimpleITK install dir to our ep dir. Furthermore force
windows to use the same location for the python egg Linux does.
Copy SimpleITK libraries to installer
Test Plan: Should be caught by the MITK python SimpleITK test if run
Reviewers: O1 MITK Core, kislinsk
Reviewed By: O1 MITK Core, kislinsk
Maniphest Tasks: T24085
Differential Revision: https://phabricator.mitk.org/D124