Improved exception when encryption fails
Add comments for verification (howto)
Move to TomP2P v5 from github
Fixed (almost all) test cases to run with TomP2P 5
Merge branch 'move-to-tomp2p-5'

Conflicts:
	org.hive2hive.core/src/org/hive2hive/core/process/ProcessStep.java
	org.hive2hive.core/src/org/hive2hive/core/process/PutVerificationListener.java