Improve CI testing and code quality

[dustinspecker]

1. [x] Add JSHint and JSCS to Travis CI build job
2. [ ] Add Code Climate badge
   1. [ ] Achieve 3.9+ GPA
3. [ ] Setup http://www.appveyor.com/ to build and test generator-ng-poly on Windows boxes
4. [ ] Setup Travis CI to...
   1. [ ] run generator-ng-poly to build a project with all sub-generators used and using...
      1. [ ] JS, HTML, CSS, ngRoute, Polymer, all Bower options
      2. [ ] CoffeeScript, Jade, Less, UI Router
      3. [ ] JS, HAML, Sass
      4. [ ] JS, HTML, Stylus
   2. [ ] add travis and AppVeyor configs to these projects
   3. [ ] push these projects to respective repos where each will...
      1. [ ] run unit tests on Travis CI
         1. [ ] run e2e tests on SauceLabs
      2. [ ] run unit tests on AppVeyor