Merge commit 'glytch/master'

* commit 'glytch/master':
  tests for null value change
  don't die on null values

examples/null_string.html

@@ -0,0 +1,5 @@
+Hello {{name}}
+glytch {{glytch}}
+binary {{binary}}
+value {{value}}
+numeric {{numeric}}

examples/null_string.js

@@ -0,0 +1,9 @@
+var null_string = {
+  name: "Elise",
+  glytch: true,
+  binary: false,
+  value: null,
+  numeric: function() {
+    return NaN;
+  }
+};

examples/null_string.txt

@@ -0,0 +1,5 @@
+Hello Elise
+glytch true
+binary false
+value 
+numeric NaN

mustache.js

@@ -194,7 +194,7 @@ var Mustache = function() {
       Does away with nasty characters
     */
     escape: function(s) {
-      return (s ? s.toString() : "").replace(/[&"<>\\]/g, function(s) {
+      return ((s == null) ? "" : s).toString().replace(/[&"<>\\]/g, function(s) {
         switch(s) {
           case "&": return "&amp;";
           case "\\": return "\\\\";;