[GSOC-UPDATE] Impress Remote

[Andrzej J. R. Hunt]

Hi everyone,

Today's updates:
- Refactoring of the Communication Service for fully threaded networking.
- Pairing now works!*

* Pairing by itself works, if the correct IP address is known. Finding 
servers / their IP addresses also works. (I don't yet know whether the 
two combined work -- I'm currently away from home, and without access to 
a wireless router -- server finding doesn't work in the emulator, and 
tethering doesn't allow communication between phone and computer -- I'm 
still looking at how to test this, but from the weekend I'm home again 
where I can properly test.) Finally, the Libreoffice dialog needed for 
pairing works, but still needs some GUI work.

Cheers,

Andrzej