fix jslint errors

- remove .jshintrc because it would conflict our options in gruntfile.js
- ignore W015 for indent problem
- ignore W117 for camel naming, we just follow angularjs tradition.
- refine the path in jshint.all.src to include multiple layers of dir.
- remove jquery-private, it's not used because we need
bootstrap-dropdown, and we didn't find a way to let it know our
jquery-private.