bring back toHex

lib/main.js

@@ -227,6 +227,16 @@ var web3 = {
     _events: {},
     providers: {},
 
+    toHex: function(str) {
+        var hex = "";
+        for(var i = 0; i < str.length; i++) {
+            var n = str.charCodeAt(i).toString(16);
+            hex += n.length < 2 ? '0' + n : n;
+        }
+
+        return hex;
+    },
+
     toAscii: function(hex) {
         // Find termination
         var str = "";