added font files for bold and italic Computer Modern

Author: Paul Butler

styles/custom.css

@@ -3,6 +3,16 @@
         font-family: "Computer Modern";
         src: url('http://9dbb143991406a7c655e-aa5fcb0a5a4ec34cff238a2d56ca4144.r56.cf5.rackcdn.com/cmunss.otf');
     }
+    @font-face {
+        font-family: "Computer Modern";
+        font-weight: bold;
+        src: url('http://ctan.mirror.rafal.ca/fonts/cm-unicode/fonts/otf/cmunsx.otf');
+    }
+    @font-face {
+        font-family: "Computer Modern";
+        font-style: oblique;
+        src: url('http://ctan.mirror.rafal.ca/fonts/cm-unicode/fonts/otf/cmunsi.otf');
+    }
     div.cell{
         width:800px;
         margin-left:16% !important;
@@ -57,4 +67,4 @@
                     styles: {'.MathJax_Display': {"margin": 4}}
                 }
         });
-</script>
+</script>