Update unit tests for graphite
settings.graphite_prefix -> graphite_querystring

* Allows the user to have more control over the querystring
that is passed into graphite /render? method.

* Should ultimately result in fewer hardcoded values like height and width
graphite.py - remove arguments height width prefix

They are no longer needed as they now all come from
settings.py
Update unit tests for graphite
Update unit tests for graphite
graphite.py - title -> settings.graphite_title

title is now also configurable from settings.py
settings.graphite_querystring -> /misc/settings

Added graphite_querystring into adagios.conf and into
/misc/settings.

Same applies for graphite_title which is now configurable as well
graphite.py - update docstrings
CHANGES updated
graphite: use the official regex to replace illegal characters
Update default graphite_querystring
Merge branch 'bugfix-graphite' of https://github.com/matthieucan/adagios into matthieucan-feature-graphite

Conflicts:
	adagios/status/graphite.py
pep8 fixes
Merge branch 'master' into matthieucan-feature-graphite

Conflicts:
	adagios/status/tests.py
Merge pull request #363 from opinkerfi/matthieucan-feature-graphite

settings.graphite_prefix -> graphite_querystring