add module usage info to docs

jc/parsers/netstat.py

@@ -1,9 +1,14 @@
 """jc - JSON CLI output utility netstat Parser
 
-Usage:
+Usage (cli):
 
     Specify --netstat as the first argument if the piped input is coming from netstat
 
+Usage (module):
+
+    import jc.parsers.netstat
+    result = jc.parsers.netstat.parse(netstat_command_output)
+
 Caveats:
 
     - Use of multiple 'l' options is not supported on OSX (e.g. 'netstat -rlll')