Started integration of pypo with Campcaster. Refactored pypo so that

it can work with either OBP or Campcaster.  Added the liquidsoap
binary.  Started to add the PHP API scripts to send the correct data
to pypo (those these are not pretty - all one-off scripts for each
API command). Added Zend to the default path.

3rd_party/pypo/api_clients/api_client_factory.py

@@ -0,0 +1,9 @@
+import campcaster_api_client
+import obp_api_client
+
+def create_api_client(config):
+    if config["api_client"] == "campcaster":	
+        return campcaster_api_client.CampcasterApiClient(config)
+    elif config["api_client"] == "obp":
+        return obp_api_client.ObpApiClient(config)
+