Adding solidity example file

libraries/src/main/resources/Greeting.sol

@@ -0,0 +1,19 @@
+pragma solidity ^0.4.0;
+
+contract Greeting {
+    address creator;
+    string message;
+
+    function Greeting(string _message) {
+        message = _message;
+        creator = msg.sender;
+    }
+
+    function greet() constant returns (string) {
+        return message;
+    }
+
+    function setGreeting(string _message) {
+        message = _message;
+    }
+}