Improvements over last version

• New delivery type: Reliable sequenced (Lost packets are resent but late arrivals are dropped)
• Disconnects and shutdown requests are now queued properly, so calling shutdown will still send any queued messages before shutting down
• All messages are pooled/recycled for zero garbage
• Reduced CPU usage and lower latencies (in the <1 ms range, but still) due to better socket polling
• All public members of NetPeer/NetConnection are completely thread safe
• Larger number of delivery channels
• More exact roundtrip measurement
• Method serialize entire objects via reflection
• Unique identifier now exists for all peers/connections
• More flexible peer discovery; filters possible and arbitrary data can be sent with response
• Much better protection against malformed messages crashing the app

API enhancements:

• NetPeerConfiguration immutable properties now locked once NetPeer is initialized
• Messages cannot be send twice by accident
• Impossible to confuse sending and receiving buffers since they're different classes
• No more confusion if user should create a buffer or preallocate and reuse