Merge new-build-process

[chris-steele]

#231, #233

Update

• use rollup as the bundler rather than requirejs
• be able to fully utilise ES6 and beyond
• be backwards compatible with existing code base
• include React support
• compile sources in situ rather than copying them
• watch sources and compile on change
• no longer need to restart backend stack when working on UI
• cache bundler output for faster builds

Much of this work has been inspired by the Adapt framework.

Instructions

• checkout no-sidebar-new-build-process
• run npm start
• wait for UI successfully built notice
• edit js/jsx/hbs*/less and observe console
• reload browser to see changes

*core index.hbs/loading.hbs are not pre-compiled and will be cached by the express templating engine; so in the (unlikely) event these are edited the process may need to be restarted

Notes

• Compilation cache will be cleared once on npm start but you can use npm start -- --disable-cache to always bypass cache if you wish
• Example React conversion of appHeader