Added Monitor doc string and updated lib ref so it shows up.  Added private method documentation printing for sphinx.
Updated phrasing.
@@ -77,10 +77,16 @@ Python Triggers
Testbench Structure
===================
+Driver
+------
+
.. autoclass:: cocotb.drivers.Driver
:members:
:private-members:
+Monitor
+-------
+
.. autoclass:: cocotb.monitors.Monitor
:members:
:private-members:
