Upgrades grainstore
Release 0.23.0
Stubs next version
Adds tests for PNG32 vs PNG8 comparison. There is a small frontend to
compare the results from both formats.
Reports similarity when comparing images. Creates png dir.
Removes cartocss rule
Merge pull request #198 from CartoDB/CDB-3664

Adds tests for PNG32 vs PNG8 comparison
Upgrades dependencies
Specifies name in the redis pool
Release 0.24.0
Stubs next version
Merge branch 'master' into torque_query