* Work on converting lib to standard
* Finish updating lib
* Finish linting lib
* Format test files
* Add .eslintrc with standard format
* Supply full path to eslint bin
* Move lint command to package.json
* Add eslint as dev dependency
* Remove unsupported Node versions 0.10 and 0.12 from CI
* Replace deprecated Buffer constructor with .from/.alloc
* Remove Promise polyfill
* Make use of Object.assign
* Remove checks for versions of Node earlier than 4
* Remove Buffer#indexOf fallback for Node 0.10
The promise adapter I had implemented wasn't spec compliant: it didn't accept both `onSuccess` and `onFailure` in the call to `query#then`. This subtly broke yield & async/await because they both rely on `onError` being passed into `Promise#then`. The pool was also not returning the promise after a client was acquired, which broke awaiting on `pool.connect` - this is also fixed now.