Added ucfirst equivalent

Author: photonstorm

src/utils/string/UppercaseFirst.js

@@ -0,0 +1,6 @@
+var UppercaseFirst = function (str)
+{
+    return str && str[0].toUpperCase() + str.slice(1);
+};
+
+module.exports = UppercaseFirst;

src/utils/string/index.js

@@ -1,7 +1,10 @@
+//  Phaser.Utils.String
+
 module.exports = {
 
-    Pad: require('./Pad'),
     Format: require('./Format'),
-    Reverse: require('./Reverse')
+    Pad: require('./Pad'),
+    Reverse: require('./Reverse'),
+    UppercaseFirst: require('./UppercaseFirst')
 
 };