Add paragraph on code style

docs/development.rst

@@ -24,10 +24,25 @@ modular, so we can extend it with other backends in the future, like file
 playback and other online music services such as Last.fm.
 
 
+Code style
+==========
+
+We generally follow the `PEP-8 <http://www.python.org/dev/peps/pep-0008/>`_
+style guidelines, with a couple of notable exceptions:
+
+- We only indent continuation lines with an addition four spaces relative to
+  the previous line.
+- An exception to the previous exception: When continuing control flow
+  statements like ``if``, ``for`` and ``while``, indent the continuation lines
+  with eight spaces, so that it is indented an additional level compared to the
+  following block of code.
+
+
 Running tests
 =============
 
-To run tests, you need a couple of dependiencies. Some can be installed through Debian/Ubuntu package management::
+To run tests, you need a couple of dependencies. Some can be installed through
+Debian/Ubuntu package management::
 
     sudo aptitude install python-coverage