IBR-DTN Java Lib: Add P2PExtensionClient

This class allows to control the P2P features of the DTN daemon.
IBR-DTN Android: Adapt daemon managing code to the latest dtnd build

Add "-v" parameter on daemon startup.
Listen to new startup log message.
IBR-DTN Android: Link P2PManager with the dtnd process

New dtnd binaries added with P2P support.
New ibrdtnlib added with P2P support.
P2PManager extended with basic functionalities and a little
description how to use the library.
SecurityBlock: Fix wrong iterator in Security Destination decoding.
PayloadConfidentialBlockTest refined
ibrcommon: Renamed sub-library to avoid libssl.a bug on recompilation
ibrcommon: Add unittest for RSASHA256Stream
ibrcommon: Changed buffer casting in RSASHA256Stream
ibrdtn: Add unittest for PayloadIntegrityBlock