fix browser tests for Point and Key

The addUncompressed function is for node-only, and is a temporary workaround
until we expose a better crypto interface in both node and the browser. I wrote
tests for this function that were node-only, but were broken in the browser.  I
also wrote tests for the Point class that should have worked in both node and
the browser, and did, but I was using the wrong module such that it worked only
in node.  This update makes the tests work in the browser by using the correct
module.

test/index.html

@@ -28,6 +28,7 @@
     <script src="test.Opcode.js"></script>
     <script src="test.Peer.js"></script>
     <script src="test.PeerManager.js"></script>
+    <script src="test.Point.js"></script>
     <script src="test.PrivateKey.js"></script>
     <script src="test.RpcClient.js"></script>
     <script src="test.Script.js"></script>

test/test.Key.js

@@ -1,12 +1,11 @@
-'use strict';
 
-var assert = require('assert');
 var chai = chai || require('chai');
 var bitcore = bitcore || require('../bitcore');
-var coinUtil = coinUtil || require('../util/util');
+var coinUtil = coinUtil || bitcore.util;
 var buffertools = require('buffertools');
 
 var should = chai.should();
+var assert = chai.assert;
 
 var Key = bitcore.Key;
 describe('Key', function() {
@@ -115,6 +114,10 @@ describe('Key', function() {
     ret.should.equal(false);
   });
 
+
+  //node tests only
+  //addUncompressed is a node-only interface feature
+  if (typeof process !== 'undefined' && process.versions) {
     describe('#addUncompressed', function() {
       it('should exist', function() {
         should.exist(Key.addUncompressed);
@@ -162,5 +165,6 @@ describe('Key', function() {
       });
 
     });
+  }
 
 });

test/test.Point.js

@@ -1,13 +1,13 @@
 'use strict';
 
-var assert = require('assert');
 var chai = chai || require('chai');
 var bitcore = bitcore || require('../bitcore');
-var coinUtil = coinUtil || require('../util/util');
+var coinUtil = coinUtil || bitcore.util;
 var buffertools = require('buffertools');
 var bignum = require('bignum');
 
 var should = chai.should();
+var assert = chai.assert;
 
 var Point = bitcore.Point;
 var Key = bitcore.Key;