fix scalability and clean up code

 * nested loop sent each metric n times per tick
 * logging framework + terser output
 * fix frequency handling
 * remove boilerplate
 * improve code style
 * closes #109

config/client.conf

 [Client]
-Debug = True
+Debug = False
 
 [Metrics]
 cpuUsage = 5

manage.py

+import logging
 import sys
 from src import cnfparse
 from src import client
@@ -5,6 +6,11 @@ from src.collectables import collectables
 
 
 def main():
+    # define a Handler which writes INFO messages or higher to the sys.stderr
+    logging.basicConfig(
+        level=logging.INFO,
+        format='[%(asctime)s: %(levelname)s/%(name)s] %(message)s')
+
     if len(sys.argv) < 2:
         print("usage: manage.py run")
     if len(sys.argv) is not 2 and sys.argv[1] is not "run":

requirements.txt

 psutil==1.2.1
-pika==0.9.13
+pika