New major release of TomP2P 4.1.0-preview. The changes are: 
- Removed Guava, switched back to Java collections
 - Removed BerkeleyDB, switched to JDBM, rewrote storage
 - Added build-pattern to create peers
 - Switched from Java5 to Java6
 - Many, many bugs fixed
 - Added new examples
 - Further preparation for MapReduce