Add new Distil project

Distil is a rating service of OpenStack to provide easy
interactions with user's existing billing systems, by
exposing a configurable set of collection tools and
transformers to make usable rating data out of Ceilometer
entries.

Change-Id: Ibb0bb71fb37ba45d4ac4598e2f90a5510fc09634
Merge "Add new Distil project"