Update documentation

Author: AllenDowney

api/404.html

@@ -69,7 +69,9 @@
 
 
 
-<header class="md-header" data-md-component="header">
+  
+
+<header class="md-header md-header--shadow" data-md-component="header">
   <nav class="md-header__inner md-grid" aria-label="Header">
     <a href="/." title="ModSimPy Documentation" class="md-header__button md-logo" aria-label="ModSimPy Documentation" data-md-component="logo">
 
@@ -153,54 +155,6 @@
 
 
 
-            
-<nav class="md-tabs" aria-label="Tabs" data-md-component="tabs">
-  <div class="md-grid">
-    <ul class="md-tabs__list">
-      
-        
-  
-  
-  
-  
-    <li class="md-tabs__item">
-      <a href="/." class="md-tabs__link">
-        
-  
-  
-    
-  
-  Home
-
-      </a>
-    </li>
-  
-
-      
-        
-  
-  
-  
-  
-    
-    
-      <li class="md-tabs__item">
-        <a href="/api/modsim/" class="md-tabs__link">
-          
-  
-  
-  API Reference
-
-        </a>
-      </li>
-    
-  
-
-      
-    </ul>
-  </div>
-</nav>
-          
 
 
       <main class="md-main" data-md-component="main">
@@ -214,10 +168,8 @@
 
 
 
-  
 
-
-<nav class="md-nav md-nav--primary md-nav--lifted" aria-label="Navigation" data-md-level="0">
+<nav class="md-nav md-nav--primary" aria-label="Navigation" data-md-level="0">
   <label class="md-nav__title" for="__drawer">
     <a href="/." title="ModSimPy Documentation" class="md-nav__button md-logo" aria-label="ModSimPy Documentation" data-md-component="logo">
 
@@ -242,7 +194,7 @@
 
 
   <span class="md-ellipsis">
-    Home
+    Welcome to ModSimPy Documentation
 
   </span>
 
@@ -252,81 +204,6 @@
 
 
 
-      
-      
-  
-  
-  
-  
-    
-    
-    
-    
-      
-      
-        
-      
-    
-    
-    <li class="md-nav__item md-nav__item--nested">
-      
-        
-        
-          
-        
-        <input class="md-nav__toggle md-toggle md-toggle--indeterminate" type="checkbox" id="__nav_2" >
-        
-          
-          <label class="md-nav__link" for="__nav_2" id="__nav_2_label" tabindex="0">
-            
-  
-  
-  <span class="md-ellipsis">
-    API Reference
-    
-  </span>
-  
-
-            <span class="md-nav__icon md-icon"></span>
-          </label>
-        
-        <nav class="md-nav" data-md-level="1" aria-labelledby="__nav_2_label" aria-expanded="false">
-          <label class="md-nav__title" for="__nav_2">
-            <span class="md-nav__icon md-icon"></span>
-            API Reference
-          </label>
-          <ul class="md-nav__list" data-md-scrollfix>
-            
-              
-                
-  
-  
-  
-  
-    <li class="md-nav__item">
-      <a href="/api/modsim/" class="md-nav__link">
-        
-  
-  
-  <span class="md-ellipsis">
-    modsim
-    
-  </span>
-  
-
-      </a>
-    </li>
-  
-
-              
-            
-          </ul>
-        </nav>
-      
-    </li>
-  
-
-    
   </ul>
 </nav>
                   </div>
@@ -364,12 +241,6 @@ <h1>404 - Not found</h1>
 <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script>
         </div>
 
-          <button type="button" class="md-top md-icon" data-md-component="top" hidden>
-  
-  <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M13 20h-2V8l-5.5 5.5-1.42-1.42L12 4.16l7.92 7.92-1.42 1.42L13 8z"/></svg>
-  Back to top
-</button>
-        
       </main>
 
         <footer class="md-footer">
@@ -398,7 +269,7 @@ <h1>404 - Not found</h1>
 
 
 
-      <script id="__config" type="application/json">{"base": "/", "features": ["navigation.tabs", "navigation.sections", "navigation.expand", "navigation.top"], "search": "/assets/javascripts/workers/search.d50fe291.min.js", "tags": null, "translations": {"clipboard.copied": "Copied to clipboard", "clipboard.copy": "Copy to clipboard", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.placeholder": "Type to start searching", "search.result.term.missing": "Missing", "select.version": "Select version"}, "version": null}</script>
+      <script id="__config" type="application/json">{"base": "/", "features": [], "search": "/assets/javascripts/workers/search.d50fe291.min.js", "tags": null, "translations": {"clipboard.copied": "Copied to clipboard", "clipboard.copy": "Copy to clipboard", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.placeholder": "Type to start searching", "search.result.term.missing": "Missing", "select.version": "Select version"}, "version": null}</script>
 
 
       <script src="/assets/javascripts/bundle.13a4f30d.min.js"></script>