reorganize examples into folder

contracts/examples/GoodFailEarly.sol

@@ -0,0 +1,12 @@
+contract GoodFailEarly {
+
+  uint constant DEFAULT_SALARY = 50000;
+  mapping(string => uint) nameToSalary;
+
+  function getSalary(string name) constant returns (uint) {
+    if (bytes(name).length == 0) throw;
+    if (nameToSalary[name] == 0) throw;
+
+    return nameToSalary[name];
+  }
+}