respect sphinx style guide to some extent

see http://documentation-style-guide-sphinx.readthedocs.org/en/latest/style-guide.html

doc/autotools.txt.in

@@ -0,0 +1,20 @@
+.. highlight:: sh
+
+************
+Installation
+************
+
+The @PACKAGE_NAME@ uses the GNU Build System to compile and install. If you are
+unfamiliar with it, please have a look at :file:`INSTALL`. If you have a look
+around and can not find it, you are probably working bleeding edge in the
+repository.  Run the following command in :file:`@PACKAGE_TARNAME@` to
+get the missing standard auxiliary files::
+    
+    autoreconf --verbose --install
+
+To configure (:command:`configure --help` lists possible options), build and
+install the @PACKAGE_NAME@ now do the following::
+    
+    ./configure@RECOMMENDED_CONF_OPTS@
+    make
+    make install