Espruino plugin for Rollup module bundler

You're right of course! I think I skipped the transformForEspruino processor call when I was trying to get things to work, and honestly hadn't really understood how the plugin system works until now. Now that the processor call is back my code follows the same pipeline as sendCode, and it seems to be doing just the same (I'm not calling it directly because I want more control over output).

Some more changes:

• Better options
  
  • Now supports reset, save, setTime, BLE, audio, baudRate and throttle (all with Espruino's defaults)
    
  • Any other Espruino config options may be set using their uppercase names directly
    
  • Added output option for showing the output from Espruino when sending code
    
• Detects and reports any uncaught JS errors after code has been sent (very useful)
  
• Prettier CLI with colours and all
  
  

I also figured out how to minify it even further, and added a tip for how to configure Uglify to be even uglier on the project page.