Rename GrantableToken to VestedToken

contracts/test-helpers/GrantableTokenMock.sol

@@ -1,11 +0,0 @@
-pragma solidity ^0.4.4;
-
-import '../token/GrantableToken.sol';
-
-// mock class using StandardToken
-contract GrantableTokenMock is GrantableToken {
-  function GrantableTokenMock(address initialAccount, uint initialBalance) {
-    balances[initialAccount] = initialBalance;
-    totalSupply = initialBalance;
-  }
-}

contracts/test-helpers/VestedTokenMock.sol

@@ -0,0 +1,11 @@
+pragma solidity ^0.4.4;
+
+import '../token/VestedToken.sol';
+
+// mock class using StandardToken
+contract VestedTokenMock is VestedToken {
+  function VestedTokenMock(address initialAccount, uint initialBalance) {
+    balances[initialAccount] = initialBalance;
+    totalSupply = initialBalance;
+  }
+}

contracts/token/VestedToken.sol

@@ -2,7 +2,7 @@ pragma solidity ^0.4.8;
 
 import "./StandardToken.sol";
 
-contract GrantableToken is StandardToken {
+contract VestedToken is StandardToken {
   struct TokenGrant {
     address granter;
     uint256 value;