NGI Assure project: Probabilistic NAT Traversal

See revision ccb81ca, 9fc64f3

With this milestone, we wanted to ensure that we could use the GNUnet event loop. This is done by calling the GNUnet utitlity function GNUNET_PROGRAM_run in native-lib.ccp. To let the event loop do something meaningful the very simple server from milestone 6 was made running from inside the event loop.

The biggest effort to make these few lines of code work was to solve the problems with the cross-compiling dependencies. This effort has been documented in this repository. One can find these cross compiled dependencies in the directory distribution in the android studio project.