[TokenVesting] Rename events according to convention

contracts/token/TokenVesting.sol

@@ -14,8 +14,8 @@ import '../math/SafeMath.sol';
 contract TokenVesting is Ownable {
   using SafeMath for uint256;
 
-  event Release(uint256 amount);
-  event Revoke();
+  event Released(uint256 amount);
+  event Revoked();
 
   // beneficiary of tokens after they are released
   address beneficiary;
@@ -62,7 +62,7 @@ contract TokenVesting is Ownable {
 
     released[token] = released[token].add(vested);
 
-    Release(vested);
+    Released(vested);
   }
 
   /**
@@ -78,7 +78,7 @@ contract TokenVesting is Ownable {
 
     token.transfer(owner, balance - vested);
 
-    Revoke();
+    Revoked();
   }
 
   /**