six is the canonical compatibility library for supporting
Python 2 and 3 in a single codebase.
The xrange module was removed in Python 3 and we should
use 'six.moves.range' instead of 'xrange' to make
code compatible with py 2 and 3 as well.
Partially-implements blueprint py3-compatibility
Change-Id: Id054857f320d9eda02bc0b82e5512c0595342290
After manila's fork from cinder, its docs were not
updated well.
This info is used by doc-builder, see doc/README.rst
Partially implements: blueprint manila-documentation
Change-Id: Ic97584db291b60505d5d310a517c2866fc6fcf5f
