Changelog added.

Author: exhuma

docs/changelog.rst

@@ -0,0 +1,13 @@
+Changelog
+=========
+
+Release 1.3.0
+-------------
+
+* Performance improvments for hierarchical clustering (at the cost of memory)
+* Cluster instances are now iterable.It will iterate over each element,
+  resulting in a flat list of items.
+* New option to specify a progress method. This method will be called on each
+  iteration for hierarchical clusters. It gives users a way to present to
+  progress on screen.
+* The library now also has a ``__version__`` member.

docs/index.rst

@@ -1,6 +1,18 @@
 Welcome to python-cluster's documentation!
 ==========================================
 
+Index
+-----
+
+.. toctree::
+   :maxdepth: 1
+
+   changelog
+
+
+Introduction
+------------
+
 Implementation of cluster algorithms in pure Python.
 
 As this is exacuted in the Python runtime, the code runs slower than similar