Added port to Request with matcher and test

tests/unit/test_matchers.py

@@ -38,5 +38,5 @@ def test_url_matcher():
 def test_metchers():
     assert_matcher('method')
     assert_matcher('host')
-    #assert_matcher('method')
+    assert_matcher('port')
     #assert_matcher('method')

vcr/matchers.py

@@ -13,6 +13,10 @@ def host(r1, r2):
     return r1.host == r2.host
 
 
+def port(r1, r2):
+    return r1.port == r2.port
+
+
 def path(r1, r2):
     return r1.path == r2.path
 

vcr/request.py

@@ -19,6 +19,10 @@ class Request(object):
     def host(self):
         return urlparse(self.uri).hostname
 
+    @property
+    def port(self):
+        return urlparse(self.uri).port
+
     @property
     def url(self):
         return self.uri