Add authorization printer example

examples/printers/authorization.sol

@@ -0,0 +1,25 @@
+pragma solidity ^0.4.24;
+contract Owner{
+
+    address owner;
+
+    modifier onlyOwner(){
+        require(msg.sender == owner);
+        _;
+    }
+
+}
+
+contract MyContract is Owner{
+
+    mapping(address => uint) balances;
+
+    constructor() public{
+        owner = msg.sender;
+    }
+
+    function mint(uint value) onlyOwner public{
+        balances[msg.sender] += value;
+    }    
+
+}