Implemented timer that ticks every 15 seconds.
Temporarily disabled encryption for demo purposes.
Added setter & getter for hostname.
Fixed infinite loop bug in BroadcastMessageBuilder
Initialized DataLength to a zeroed byte[] to fix a NullPointerException.
Fixed subnet in adhoc_setup
Added timer and a variable for the own User.
Initialized dataLength in DataBuilder and reserved in PacketBuilder to a zeroed byte[] to fix NullPointerException.
Fixed buffer underflow errors when reading from ByteBuffers if the buffer is too short, or if you just put a number in there.
Merge remote-tracking branch 'origin/peter' into peter

Conflicts:
	adhoc_setup
	src/network/User.java
	src/sampca/SAMPCA.java