added example use-case for Inheritable.sol

contracts/examples/SimpleSavingsWallet.sol

+pragma solidity ^0.4.11;
+
+import "../ownership/Inheritable.sol";
+
+
+/**
+ * @title SimpleSavingsWallet
+ * @dev Simplest form of savings wallet that can be inherited if owner dies.
+ */
+contract SimpleSavingsWallet is Inheritable {
+
+  event Sent(address payee, uint amount, uint balance);
+  event Received(address payer, uint amount, uint balance);
+
+
+  function SimpleSavingsWallet(uint _heartbeatTimeout) Inheritable(_heartbeatTimeout) public {}
+  
+  /**
+   * @dev wallet can receive funds.
+   */
+  function () public payable {
+    Received(msg.sender, msg.value, this.balance);
+  }
+
+  /**
+   * @dev wallet can send funds
+   */
+  function sendTo(address payee, uint amount) public onlyOwner {
+    require(payee != 0 && payee != address(this));
+    require(amount > 0);
+    payee.transfer(amount);
+    Sent(payee, amount, this.balance);
+  }
+}
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