pytec: revert changes to example.py and plot.py, save changes for other PR

pytec/example.py

@@ -1,5 +1,3 @@
-if __name__ == "__main__":
-
 from pytec.client import Client
 
 tec = Client() #(host="localhost", port=6667)

pytec/plot.py

@@ -4,8 +4,6 @@ import matplotlib.animation as animation
 from threading import Thread, Lock
 from pytec.client import Client
 
-if __name__ == "__main__":
-
 TIME_WINDOW = 300.0
 
 tec = Client()
@@ -32,7 +30,7 @@ if __name__ == "__main__":
 series = {
     'adc': Series(),
     'sens': Series(lambda x: x * 0.0001),
-        'temperature': Series(),
+    'temperature': Series(lambda t: t - target_temperature),
     'i_set': Series(),
     'pid_output': Series(),
     'vref': Series(),