Update look and feel of book

Author: bnmnetp

.gitignore

@@ -93,3 +93,4 @@ published
 pretext/GenFigs
 sphinx_settings.json
 rs-substitutes.xml
+**/GenFigs

pretext/publication-rs-academy.xml

@@ -30,6 +30,8 @@ along with PreTeXt.  If not, see <http://www.gnu.org/licenses/>.
         <platform host="runestone"/>
         <!-- knowled checkpoints interfere with ActiveCode problems -->
         <knowl exercise-inline="no" example="no" listing="yes"/>
+        <css style="wide" toc="wide" banner="wide" navbar="wide" shell="wide" />
+        <tableofcontents focused="yes" />
     </html>
 
 </publication>