Upstart task to create dirs for graphite as root.

Ugh I hate you upstart
Merge pull request #17 from ministryofjustice/service-dirs-on-reboot

Upstart task to create dirs for graphite as root.
v1.2.2
Include contrib/whisper-auto-resize.py

The main repo for https://github.com/graphite-project/whisper includes
`contrib/whisper-auto-resize.py`, which handles auditing and optionally
resizing any whisper db's found that do not match storage-schemas.conf
and storage-aggregation.conf.

This commit simply ensures it is present on the filesystem.
merge CHANGELOG
Add auto-resizing of whisper dbs

Add a wrapper around contrib/whisper-auto-resize.py to check for the
need to resize our whisper databases -- basically if the configuration
has changed, call whisper-auto-resize.py before restarting carbon.

This naturally will slow the start-up of carbon in the cases where we
have made changes, but it does ensure that we never write to the wrong
format whisper file.