fix(app-jshint): improve jshint usage

Changes:
- Update jshint task in `Gruntfile.js` to include `serverTest`
- Add `server/.jshintrc-spec` that extends `server/.jshintrc` with spec globals
- Use `"latedef": "nofunc"` instead of `"latedef": true` in `server/.jshintrc`
- Add assertion for `jshint` task in generator tests for `defaultOptions`
- Fix pre exsisting lint errors in `server` and `client`
- Change `getEmail()` in `client/app/account/settings/settings.controller` to use `user` arg and not `$scope.user`

Closes #463, #486
Merge pull request #482 from kingcody/fix/jshint

fix(app-jshint): improve jshint usage