Added print button + avoid pagebreaks after titles (doesn't work on chrome, should be tested in Firefox)

src/theme/book.css

@@ -110,6 +110,7 @@ html, body {
 
     .menu-bar i {
         position: relative;
+        margin: 0 10px;
         z-index: 10;
         line-height: 50px;
         -webkit-transition: color 0.5s; /* Safari */
@@ -118,6 +119,10 @@ html, body {
         transition: color 0.5s;
     }
 
+    .menu-bar .right-buttons {
+        float: right;
+    }
+
     .menu-bar :hover {
         /* Animate color change */
         color: #333;
@@ -285,4 +290,10 @@ html, body {
       color: #4183c4;
       text-decoration: none;
     }
+
+    h1, h2, h3, h4, h5, h6 {
+        page-break-inside: avoid;
+        page-break-after: avoid;
+        /*break-after: avoid;*/
+    }
 }

src/theme/index.hbs

@@ -22,8 +22,15 @@
 
             <div class="page">
                 <div id="menu-bar" class="menu-bar">
+                    <div class="left-buttons">
                         <i id="sidebar-toggle" class="fa fa-bars left"></i>
+                    </div>
+
                     <h1 class="menu-title">{{ title }}</h1>
+
+                    <div class="right-buttons">
+                        <i id="print-button" class="fa fa-print" title="Print this book"></i>
+                    </div>
                 </div>
 
                 <div id="content" class="content">