JSHint: remove ES5, hide script url warning in test, wrap use strict in test template

- Remove ES5 option from project jshintrc as it's now set per default
- Hide script url warning (W107) in test/test.js to make jshint happy about finding ```mocha``` in the file
- Move ```'use strict';``` inside the wrapping function in the test template, to make jshint happy when the template is used in projects that have no ```node: true``` set
- Some whitespace fixes