Use home instead of clear

Author: David Buchmann

Adafruit_CharLCD/Adafruit_CharLCD_IPclock_example.py

@@ -18,7 +18,7 @@ def run_cmd(cmd):
     return output
 
 while 1:
-    lcd.clear()
+    lcd.home()
     ipaddr = run_cmd(cmd)
     lcd.message(datetime.now().strftime('%b %d  %H:%M:%S\n'))
     lcd.message('IP %s\n' % (ipaddr))