Added a new Makefile target cleandep
Clients do now send another ROUTE_FAILURE if all of their known routes have collapsed

Check the test for further information on the scenario
The RoutingTable can now retrieve a list of possible next hops by destination address
The ARA client does now warn its last remaining route that it can no longer send over this node

See the test for further explanation
If a route is deleted due to DUPLICATE_WARNINGS its now checked if this has been the last one
Added another test to see if a route sends a ROUTE_FAILURE if only 1 hop is left
The ARA client does now also check the remaining routes on a link failure
The RoutingTable can now return a list of routes that lead over a specific next hop
If a client notices a broken link it now deletes *all* routes that lead over that hop
Fixed compilation errors for omnetARA
Fixed segfault in omnetARA
Fixed even more segfaults :/
Created a test for the preiodic neighbor activity check (failing)

This is just work in progress and kind of a transfer commit so I get
this stuff at my PC at the university
The ARA client can now periodically check for inactive neighbors

Please note that this is disabled by default and can be enabled via
the given configuration object (set neighborActivityCheckIntervalInMilliSeconds > 0)
See the test for further details.
Extended the last test (routeDiscoveryIsNotStartedTwiceIfSourceHasCompleteRouteFailure)
ARA client can now actually handle HELLO packets
Added some logging for the sending of HELLO packets
Created scenario to test the new HELLO packet feature
Added a new Makefile target cleandep
Merge branch 'develop' into routeFail

Conflicts:
	ide/dictionary.txt