Initial commit of fully mavenized build

Instead of make, maven native plugin is used to build the C/C++ JNI wrapper interface. This will make it easier to introduce proper win32 support and architecure dependend JARs to ease dependency management of client projects.

The win32 pom.xml is not yet included.

The arch-dep build can be activated by invoking 'linux' profile:

mvn package -Plinux