Start creating documentation for the parser.

docs/docs/parser.rst

@@ -0,0 +1,27 @@
+.. _xxx:
+
+Parser Tree
+===========
+
+Usage
+-----
+
+.. automodule:: jedi.parser.python
+    :members:
+    :undoc-members:
+
+
+Parser Tree Base Class
+----------------------
+
+All nodes and leaves have these methods/properties:
+
+.. autoclass:: jedi.parser.tree.NodeOrLeaf
+    :members:
+    :undoc-members:
+
+
+Utility
+-------
+
+.. autofunction:: jedi.parser.tree.search_ancestor