#23 migrate build to maven 2

[Lars Kühne]

this should lead to better multi-module support, better IDE integration, etc.

main issues:
* How do we call javac for generating the test resources? Do we need more modules, one for each version of the test library?
* How do we create the final distribution files? Maybe look at the dist module of Apache Yoko...

[Jochen Wiedmann]

I think this issue can be closed?