Small updates in preparation for stateful protocols
Added salty protocol (stateful, little overhead, PFS)
Fix nonce calculation when both sides use the same key in nacltai and salty protocols
Fixed/improved handling of timestamp in nonce in nacltai protocol
Removed/changed some debug/test code in salty protocol
Salty protocol: move local sending timestamp forward if remote has a newer timestamp
Added support for connecting over IPv6
Abort build scripts on error, added quicktun (main) executable
Added chroot support
Updated version number to 2.2.0