click module compatibility

[mmoskal]

• add compatibility layer for using MikroE click SDK drivers
• add drivers for color and airquality4 clicks
• re-work driver interface to be more flexible
• allow drivers to busy-sleep (in process() only)
• add color, eco2 and tvoc services
• app_process() now by weak-defined by default, doesn't need #define
• app now needs to call jd_process_everything() in a loop (instead of jd_services_tick(), jd_services_process_frame() etc)