New build system, library redesign

* The build system now uses autotools from A to Z
* Support for pkg-config, make install and alike
* New library design. No copy operation or memory allocation on heap during message reception which results in heavy speed improvements
* More TCP support
* Testbench (any volunteers for writing more tests?)

Note that this is a pre-release and gives a preview what is to expect with the next release. Note that this release requires some refactoring in projects which use a previous release.