doc: update Python binding documentation

Move the Python documentation into a subsection so we don't mix it with
the main library.

Signed-off-by: Daniel Wagner <[email protected]>

Author: dwsuse

doc/installation.rst.in

@@ -2,33 +2,36 @@ Installation
 ============
 
 Debian / Ubuntu:
---------------
+----------------
 
 .. code-block:: sh
 
     $ apt-get install libnvme
 
 Fedora / Red Hat:
---------------
+-----------------
 
 .. code-block:: sh
 
     $ dnf install libnvme
 
-Python Version
+Python binding
 --------------
 
-The latest Python 3 version is always recommended, since it has all the latest bells and
-whistles. libnvme supports Python 3.6 and above.
+Python Version
+^^^^^^^^^^^^^^
+
+The latest Python 3 version is always recommended, since it has all
+the latest bells and whistles. libnvme supports Python 3.6 and above.
 
 Dependencies
-------------
+^^^^^^^^^^^^
 
-libnvme only uses packages from the standard library,
-so no additional dependencies will be installed when installing libnvme.
+libnvme only uses packages from the standard library, so no additional
+dependencies will be installed when installing libnvme.
 
 Install libnvme python
--------------
+^^^^^^^^^^^^^^^^^^^^^^
 
 Debian / Ubuntu:
 
@@ -42,8 +45,8 @@ Fedora / Red Hat:
 
     $ dnf install python3-libnvme
 
-libnvme is available on `PyPI`_, and can be installed using pip. The version on PyPI is
-always the latest stable release.
+libnvme is available on `PyPI`_, and can be installed using pip. The
+version on PyPI is always the latest stable release.
 
 .. _PyPi: https://pypi.org/project/libnvme/