move continuous rebuild instruction to its own section

Author: edjw

README.rst

@@ -20,6 +20,9 @@ Writing documentation
 ---------------------
 
 1. Edit the source files in ``docs/source``.
-2. For continuous rebuilds and live-reload in the browser while editing the docs, run `sphinx-autobuild docs/source docs/build/html --open-browser`
-3. Build the HTML version using ``make html`` (in the ``docs`` folder).
-4. View the result in your browser in ``docs/build``
+2. Build the HTML version using ``make html`` (in the ``docs`` folder).
+3. View the result in your browser in ``docs/build``
+
+
+For continuous rebuilds and live-reload in the browser while editing the docs, run `sphinx-autobuild docs/source docs/build/html --open-browser`
+