Asynchronous handler

Hello Oliver,
We at i:FAO AG (http://ifao.net) needed a standard java logger to transfer logged messages to LINUX SYSLOG and deliver (some) by e-mail. Therefore I forked your project agafua and built on it. As a result many changes were introduced and the project was refactored significantly, but nevertheless I tried to keep your authorship and rights on the original code.

Now I have the permission of i:FAO Management to publish our changes as open source under Eclipse Public License and this way support agafua project.

Please review and consider merging our changes into your project.

With best regards
Rusi Popov