Updated stats on Sails

**Notes**

* Updated watcher and stars stats
* Updated "Stack Integration" to indicate that Sails is primarily server-side
* Updated "Middleware" section to indicate that Sails supports Node's `req` and `res` objects (the signature for controller actions is `function (req, res)`, and for policies is `function (req, res, next)`
* Updated "Features" section to indicate everything that Sails does (which is everything Express does, plus more)
* Updated "Database" section to indicate the primary supported DBs
* Updated "Templating" section to indicate that Sails supports all Consolidate templates

Please see [What is Sails?](https://github.com/balderdashy/sails-docs/blob/master/What-Is-Sails.md) for a good overview on Sails!