remove useless Address dependency from Keypair

to get an address from a key, just do Address().fromPubkey(key.pubkey)

lib/keypair.js

@@ -1,4 +1,3 @@
-var Address = require('../lib/address');
 var Privkey = require('./privkey');
 var Pubkey = require('./pubkey');
 var BN = require('./bn');
@@ -41,10 +40,6 @@ Key.prototype.fromString = function(str) {
   }
 };
 
-Key.prototype.getAddress = function(networkstr) {
-  return Address().fromPubkey(this.pubkey, networkstr);
-};
-
 Key.prototype.privkey2pubkey = function() {
   this.pubkey = Pubkey().fromPrivkey(this.privkey);
 };

test/keypair.js

@@ -1,7 +1,6 @@
 var should = require('chai').should();
 var bn = require('../lib/bn');
 var point = require('../lib/point');
-var Address = require('../lib/address');
 var Privkey = require('../lib/privkey');
 var Pubkey = require('../lib/pubkey');
 var Keypair = require('../lib/keypair');
@@ -94,19 +93,6 @@ describe('Keypair', function() {
 
   });
 
-  describe('#getAddress', function() {
-    
-    it('should return an address', function() {
-      var privhex = '906977a061af29276e40bf377042ffbde414e496ae2260bbf1fa9d085637bfff';
-      var pubhex = '02a1633cafcc01ebfb6d78e39f687a1f0995c62fc95f51ead10a02ee0be551b5dc';
-      var key = new Keypair();
-      key.privkey = new Privkey({bn: bn(new Buffer(privhex, 'hex'))});
-      key.privkey2pubkey();
-      key.getAddress().toString().should.equal((new Address()).fromPubkey(key.pubkey).toString());
-    });
-
-  });
-
   describe("#privkey2pubkey", function() {
     
     it('should convert this known Privkey to known Pubkey', function() {