add module usage info to docs

docs/parsers/tracepath.md

@@ -2,10 +2,15 @@
 # jc.parsers.tracepath
 jc - JSON CLI output utility tracepath Parser
 
-Usage:
+Usage (cli):
 
     specify --tracepath as the first argument if the piped input is coming from tracepath
 
+Usage (module):
+
+    import jc.parsers.tracepath
+    result = jc.parsers.tracepath.parse(tracepath_command_output)
+
 Compatibility:
 
     'linux'