Better documentation for leafs/nodes.

docs/docs/parser-tree.rst

@@ -1,3 +1,5 @@
+.. include:: ../global.rst
+
 .. _parser-tree:
 
 Parser Tree
@@ -5,19 +7,33 @@ Parser Tree
 
 The parser tree is returned by calling :py:meth:`parso.Grammar.parse`.
 
-Parser Tree Base Class
-----------------------
+.. note:: Note that parso positions are always 1 based for lines and zero
+   based for columns. This means the first position in a file is (1, 0).
+
+Parser Tree Base Classes
+------------------------
 
 All nodes and leaves have these methods/properties:
 
+.. autoclass:: parso.tree.BaseNode
+    :show-inheritance:
+    :members:
+
+.. autoclass:: parso.tree.Leaf
+    :show-inheritance:
+    :members:
+
 .. autoclass:: parso.tree.NodeOrLeaf
     :members:
     :undoc-members:
+    :show-inheritance:
 
 
 Python Parser Tree
 ------------------
 
+.. currentmodule:: parso.python.tree
+
 .. automodule:: parso.python.tree
     :members:
     :undoc-members: