location key cache in user credentials
GetUserMessageStep, user message verification
Adaption to new TomP2P version.
package restructuring
remove the old user message queue concept
base user message class
Merge branch 'um-queue' into user-messages

Conflicts:
	org.hive2hive.core/src/org/hive2hive/core/process/common/get/GetUserMessageQueueStep.java
	org.hive2hive.core/src/org/hive2hive/core/process/login/HandleUserMessageQueueStep.java
	org.hive2hive.core/src/org/hive2hive/core/process/login/PostLoginProcessContext.java
	org.hive2hive.core/src/org/hive2hive/core/process/login/SynchronizeFilesStep.java
	org.hive2hive.core/src/org/hive2hive/core/security/UserCredentials.java
signature and verification of user message base type, made usermessage a
runnable
Futures for user message get put etc.
Merge branch 'version_keys'
MErged stuff from version_keys branch.
deletion of UM Container, renaming to UserProfileTask
Merge branch 'user-messages'