Jstd supports model requests paths

- Allowing new model request paths in JSTD.conf (e.g. 'bundles/js/dev/en_GB/combined/bundle.js')
- Still supports legacy bundle paths
- Deleting old/dead code
- Changed tests to new style spec tests
- Renamed the plugin class from 'com.caplin.jstestdriver.plugin.CutlassBundleInjectorPlugin' to 'org.bladerunnerjs.jstestdriver.BRJSBundleHandler'
  - **This breaks backwards compatability**, but it is a simple find/replace to fix