add future imports

Author: manu-chroma

cwltool.py

@@ -1,5 +1,6 @@
 #!/usr/bin/env python
 from __future__ import absolute_import
+from __future__ import unicode_literals
 """Convienance entry point for cwltool.
 
 This can be used instead of the recommended method of `./setup.py install`

cwltool/__init__.py

@@ -1,3 +1,4 @@
 # -*- coding: utf-8 -*-
 from __future__ import unicode_literals
+from __future__ import absolute_import
 __author__ = '[email protected]'