Add pip module documentation

rst/modules.rst

@@ -494,6 +494,38 @@ from /usr/bin/ansible::
 
 .. postgresql_db:
 
+
+.. _pip:
+
+pip
+```
+
+Manages Python library dependencies.
+
++--------------------+----------+---------+----------------------------------------------------------------------------+
+| parameter          | required | default | comments                                                                   |
++====================+==========+=========+============================================================================+
+| name               | no       |         | The name of a Python library to install                                    |
++--------------------+----------+---------+----------------------------------------------------------------------------+
+| version            | no       |         | The version number to install of the Python library specified in the       |
+|                    |          |         | 'name' parameter                                                           |
++--------------------+----------+---------+----------------------------------------------------------------------------+
+| requirements       | no       |         | The path to a pip requirements file                                        |
++--------------------+----------+---------+----------------------------------------------------------------------------+
+| virtualenv         | no       |         | An optional path to a virtualenv directory to install into                 |
++--------------------+----------+---------+----------------------------------------------------------------------------+
+| state              | no       | present | 'present', 'absent' or 'latest'                                            |
++--------------------+----------+---------+----------------------------------------------------------------------------+
+
+Examples::
+
+    pip name=flask
+    pip name=flask version=0.8
+    pip name=flask virtualenv=/srv/webapps/my_app/venv
+    pip requirements=/srv/webapps/my_app/src/requirements.txt
+    pip requirements=/srv/webapps/my_app/src/requirements.txt virtualenv=/srv/webapps/my_app/venv
+    
+
 postgresql_db
 `````````````