DOC: move license to a separate page

Author: pavoljuhas

doc/manual/source/index.rst

@@ -48,27 +48,21 @@ Pavol Juhás, Christopher L. Farrow, Simon J.L. Billinge.
 For a detailed list of contributors see
 https://github.com/diffpy/diffpy.srreal/graphs/contributors.
 
-===================
-Disclaimer
-===================
-
-.. literalinclude:: ../../../LICENSE.txt
-
 ======================================
 Installation
 ======================================
 
 See the `README <https://github.com/diffpy/diffpy.srreal#requirements>`_
 file included with the distribution.
 
-
 ======================================
-API and Index
+Table of contents
 ======================================
 
 .. toctree::
-   :maxdepth: 2
+   :titlesonly:
 
+   license
    api/diffpy.srreal.rst
 
 * :ref:`genindex`

doc/manual/source/license.rst

@@ -1,3 +1,5 @@
+.. index:: license
+
 License
 #######