Make Java Connection implement AutoCloseable (since JRE 1.7)

[Genhis]

Benefits:

• Connection is closed when exception is thrown

• Simpler usage:

  (before)

  try {
      Connection connection = Connection.newInstance("Launch into orbit");
       //your code
       connection.close();
   }
  

  (after)

  try(Connection connection = Connection.newInstance("Launch into orbit")) {
      //your code
  }
  

[djungelorm]

Looks good thanks! I've also updated the code examples in the docs to use this feature.