Level control haunted OS X input slider

fix-mic-level.sh

## The script for our case came down to this:
​
while true ; do
		CURR_LEVEL=$(osascript -e "input volume of (get volume settings)")
		echo "Setting at : ${CURR_LEVEL}";
		while (( $CURR_LEVEL < 50 )); do
			TARGET_LEVEL=$(($CURR_LEVEL + 3));
			echo "Setting to : ${TARGET_LEVEL}";
			osascript -e 'display notification "Setting to: '"$TARGET_LEVEL"'" with title "My Mic App"'
			osascript -e "set volume input volume ${TARGET_LEVEL}";
			sleep 0.01;
			CURR_LEVEL=$(osascript -e "input volume of (get volume settings)");
		done;
		sleep 1;
done;