Added light fonts

Author: rougier

book.css

@@ -6,6 +6,14 @@
     src: url('fonts/SourceCodePro-Regular.otf.woff') format('woff');
 }
 
+@font-face{
+    font-family: 'Source Code Pro';
+    font-weight: 100;
+    font-style: normal;
+    font-stretch: normal;
+    src: url('fonts/SourceCodePro-Light.otf.woff') format('woff');
+}
+
 @font-face{
     font-family: 'Source Sans Pro';
     font-weight: 400;
@@ -22,6 +30,14 @@
     src: url('fonts/SourceSansPro-It.otf.woff') format('woff');
 }
 
+@font-face{
+    font-family: 'Source Sans Pro';
+    font-weight: 100;
+    font-style: italic;
+    font-stretch: normal;
+    src: url('fonts/SourceSansPro-LightIt.otf.woff') format('woff');
+}
+
 html {
 }