add docs to Address class

lib/Address.js

@@ -1,3 +1,34 @@
+// Address
+// =======
+//
+// Handles a bitcoin address
+//
+//
+// Synopsis
+// --------
+// ```
+//     var address = new Address('1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa');
+//     if (address.isValid()) {
+//        //...
+//     }
+//
+//     // Also an address can be created from 
+//     // public keys
+//     var address = Address.fromPubKey(myPubkey);
+//
+//     // Or from a ScriptPubKey (from a transaction output)
+//     var address  = Address.fromScriptPubKey(scriptPubKey);
+//
+//     // Multisig address p2sh handling
+//     var myPukeys = [pubkey0, pubkey1, pubkey2]; 
+//     var p2shAddress = Address.fromPubKeys(2, myPubkeys);
+//     if (p2shAddress.isScript()) { //true 
+//     }
+//
+//
+// ```
+
+
 'use strict';
 var imports = require('soop').imports();
 var coinUtil = imports.coinUtil || require('../util');
@@ -31,7 +62,7 @@ Address.fromKey = function(key, network) {
   return Address.fromPubKey(key.public, network);
 };
 
-//create a p2sh m-of-n multisig address
+// create a p2sh m-of-n multisig address
 Address.fromPubKeys = function(mReq, pubKeys, network, opts) {
   if (!network)
     network = 'livenet';
@@ -43,7 +74,6 @@ Address.fromPubKeys = function(mReq, pubKeys, network, opts) {
   }
 
   var script = Script.createMultisig(mReq, pubKeys, opts);
-
   return Address.fromScript(script, network);
 };
 
@@ -101,7 +131,7 @@ Address.fromScriptPubKey = function(scriptPubKey, network) {
   return ret;
 };
 
-
+// validates the address
 Address.prototype.validate = function() {
   this.doAsBinary(function() {
     Address.super(this, 'validate', arguments);
@@ -115,6 +145,7 @@ Address.prototype.isValid = function() {
   return answer;
 };
 
+// returns the network information (livenet or testnet, as described on networks.js) of the address
 Address.prototype.network = function() {
   var version = this.version();
 
@@ -130,6 +161,7 @@ Address.prototype.network = function() {
   return answer;
 };
 
+// returns true is the address is a pay-to-script (P2SH) address type.
 Address.prototype.isScript = function() {
   return this.isValid() && this.version() === this.network().P2SHVersion;
 };