Starts using cartodb-psql node module in SQL API
Adds dependency in npm-shrinkwrap
Fixes version in npm-shrinkwrap
Removes pg dependency as now it's behind cartodb-psql
Merge pull request #169 from CartoDB/use-cartodb-psql

Use cartodb psql
Upgrades cartodb-redis
Merge pull request #170 from CartoDB/upgrade-cartodb-redis

Upgrades cartodb-redis
Merge branch 'master' into upgrade-dependencies

Conflicts:
	app/models/psql.js
	npm-shrinkwrap.json
	package.json
Updates news
Uses https endpoints for dependencies