chore(core): remove unused .npmrc

Remove .npmrc that was used to install postinstall hooks for
OpsWorks, but it doesn't work.
Chore(core): add Sails server

Sets up the basis configuration of the sails server.
Chore(core): sets up testing for Sails

Increases timeout and sets up Sails test before and after helpers.
chore(core): add Gemnasium status image

Add support for Gemnasium, to track dependencies outdated status
and security alerts.
chore(core): remove unused dependencies

Remove unused dependencies from package.json
chore(core): add timeout to testing

Fix timeouts to Mocha test suites.
chore(core): remove Gulp test Growl notifications

Not needed since other Growl notifications are performed by Gulp.
chore(core): add Database secure tokens

Add RDS Database passwords and hosts as environment variables for
local development, Travis and OpsWorks.
chore(core): keep ping response small

Keep ping response size small in order to do load testing without
incurring too much charges with AWS.
chore(core): increase timeout for testing

Increase timeout for integration testing to 20seconds for setting
up the server, because Travis can be slow.
chore(core): increase timeout time for test again

Increase timeout for integration tests from 20s to 40s because
Travis is quite slow.
choir(core): increase again timeout for tests
choir(core): add Plumber to handle Gulp errors
choir(core): remove Plumber from test suites

Remove Gulp plugin Plumber from test hook because it makes failing
test not actually fail.
chore(core): remove silent mode from Sails

Remove silent mode from Sails in integration tests, to print
useful messages when something goes wrong.
chore(core): try to fix Travis RDS connection

Tries to fix Travis accessing securely RDS credentials to do
tests while using AWS database.
chore(core): try to fix Travis database problem
chore(core): try to fix Travis database again
chore(core): remove stub testing RDS connection
chore(core): Fix RDS connection problem