public key retrieval before addtorudp
further work on fixing public key issue
minor change
adding TimedHolder container to hold public key
Merge branch 'next' into public_key

Conflicts:
	src/maidsafe/routing/routing_impl.cc
testing publickey-container
avoids sending multiple connect requests to the same target
minor clean up
minor change in timed_container
test of join on public key retrieval failure
minor fixes
Merge branch 'next' into public_key
Windows compile fix
preparation to start ack
moving network related classes to network_utils
Initial work on implementing ack
further work on ack
debugging group ack
further work on debugging ack for group messaging
further fixes on ack