Adds default values for slow queries in redis
Reduces travis dependencies installation
Merge pull request #221 from CartoDB/remove-travis-mapnik

Reduces travis dependencies installation
Let's use travis postgresql addon instead of manually installed one
Merge pull request #222 from CartoDB/remove-travis-mapnik

Let's use travis postgresql addon instead of manually installed one
Remove self-signed certificates workaround
Merge pull request #223 from CartoDB/remove-travis-mapnik

Remove self-signed certificates workaround
Merge branch 'master' into one-redis-mpool