added fallback to cairocffi if pycairo is not installed. cairocffi is installable through pip
Merge pull request #341 from anotherthomas/master

Fall back to cairocffi if pycairo is not installed
add new function offsetToZero
more documentation and an example for offsetToZero
add graphite-observer to tools.rst
Merge pull request #347 from mprovost/master

new function offsetToZero
Merge pull request #348 from huoxy/master

add graphite-observer to tools.rst
update urls for structured_metrics and graph-explorer
Merge pull request #352 from g76r/master

.gitignore for local_settings
Merge pull request #350 from vimeo/tools

update urls for structured_metrics and graph-explorer
add sortByTotal function
test for sortByTotal
Merge pull request #358 from mattus/sortbytotal

add sortByTotal function
added Graphite-Newrelic to tools documentation

Graphite-Newrelic is a plugin to the New Relic Platform
that allows reporting graphite data into New Relic.
Merge pull request #359 from gingerlime/master

added Graphite-Newrelic to tools documentation