little improvement
Merge remote-tracking branch 'origin/master'

Conflicts:
	.idea/workspace.xml
	app/build/generated/source/r/debug/com/maddies/arduinobluetoothapp/R.java
	app/build/intermediates/classes/debug/com/maddies/arduinobluetoothapp/MainActivity$1.class
	app/build/intermediates/classes/debug/com/maddies/arduinobluetoothapp/MainActivity.class
	app/build/intermediates/classes/debug/com/maddies/arduinobluetoothapp/R$id.class
	app/build/intermediates/classes/debug/com/maddies/arduinobluetoothapp/R$layout.class
	app/build/intermediates/classes/debug/com/maddies/arduinobluetoothapp/R$menu.class
	app/build/intermediates/classes/debug/com/maddies/arduinobluetoothapp/R$string.class
	app/build/intermediates/classes/debug/com/maddies/arduinobluetoothapp/R$style.class
	app/build/intermediates/classes/debug/com/maddies/arduinobluetoothapp/R.class
	app/build/intermediates/dex/debug/classes.dex
	app/build/intermediates/incremental/mergeResources/debug/merger.xml
	app/build/intermediates/res/debug/values-v21/values.xml
	app/build/intermediates/res/debug/values/values.xml
	app/build/outputs/apk/app-debug-unaligned.apk
	app/build/outputs/apk/app-debug.apk
	build/intermediates/model_data.bin