Implemented interface for controlling RGB Led
Added RGB Led notifications based conditional compilation using macros
Updated binaries using latest code
Updated to latest binaries
Completed RGB notifications and user control (Tested on Core)
Add Wi-Fi security choice to USB credentials reader, close #9142857151496
Implemented arduino's micros() function
Merge branch 'feature/rgb-control', close #9095713272910

Conflicts:
	build/core-firmware.bin
	build/core-firmware.elf
	build/core-firmware.hex
Implemented Arduino's shiftIn() & shiftOut()
Implemented Spark.deviceID()
Re-request chunk on timeout (refer latest core-communication-lib)
Merge branch 'master' into compile-staging

Conflicts:
	src/application.cpp