Changing program_serial command assignment

The previous call to bash using 'sh' limits what the given bash script can execute. Changing it to 'bash' (superset of 'sh') allows for a greater range of functions available to use in executed script.

Author: edspark

test.py

@@ -270,7 +270,7 @@ def killall_avrdude():
 def program_serial():
         serial_hopeful = False
         print "serial programming beginning..."
-        command = "sh /home/pi/SERIAL_UPLOAD/pi_serial_upload.sh"
+        command = "bash /home/pi/SERIAL_UPLOAD/pi_serial_upload.sh"
         import subprocess
         process = subprocess.Popen(command.split(), stdout=subprocess.PIPE)
         #output = process.communicate()[0]