change script mode; cleanup setup_notes

salt/drone/setup_notes.txt

-I2C:
-
-    sudo apt-get install pigpio python-pigpio python3-pigpio
-    sudo systemctl enable pigpiod.service
-
-    Change priority:
-        Add
-            CPUSchedulingPolicy=fifo
-            CPUSchedulingPriority=
-        to [Service] in /lib/systemd/system/pigpiod.service
-            sudo systemctl daemon-reload
-            sudo systemctl restart pigpiod.service
-
 UART:
 
-    sudo apt-get install minicom
     /boot/config.txt: enable_uart=1
     raspi-config: Serial->disable Login Shell
     sudo usermod -a -G dialout rna
+    sudo apt-get install python-serial
 
+For Testing:
+    sudo apt-get install minicom
     minicom -b 9600 -H -o -D /dev/ttyS0
-
-    sudo apt-get install python-serial