Fix RoutingTable graph generator

Three small fixes:
- Remove space in toGraph (no spaces allowed in URLs)
- Fix documentation for toGraphUri function
- Use http instead of https for less overhead and more debug.
Application layer refactorings.
Make logger not static
Merge branch 'master' of https://github.com/i3anaan/serialkiller
merge
WHOIS implementation + ULP fix
FileTransfer Implementation
FileTransfer Implementation
FileTransfer Implementation + JJ Merge
Fixed chat, chatting now possible. WHOIS temporarily disabled
Fixed filetransfer, filetransfers now possible, WHOIS problem persists
NPE bugfixes and code cleanup
NPE bugfixes and code cleanup
Merge branch 'janjelle' into martijn
fix
Add host() method to network layer
Add toString for Payload class
test
test
Merge remote-tracking branch 'origin' into martijn