Merge pull request #2 from WimPessemier/master

Bugfix for WriteRequestTarget (fixes also Client::write())
Merge pull request #3 from WimPessemier/master

Extra logging to catch bug for FindServers()
added async examples
added async read/write convenience functions
added beginRead and beginWrite unit tests
added changes explanantion
updated to 1.3
Merge pull request #4 from WimPessemier/async_read_write_convenience

Asynchronous read write convenience functions are now added