Add VarInt methods to MinecraftStream
Rework PacketReader to support multiple network modes
Update README
Modified network infrastructure a bit
Switch to UTF-8 strings
PacketReader -> NetworkManager
Implement status protocol mode
Altered stream handling in NetworkManager
Implement login protocol mode
Fix NetworkStream string implementation
Implement 0x00-0x0B play mode packets
Fix problems with length handling in NetworkManager
Add all clientbound play mode packets
Don't flush BufferedStream if not initialized
Move packet IDs out of packet structs and modify ID logic
varints are actually up to 28 bits long
Implement remaining 1.7.x packet definitions
Assign packet IDs to packet implementations
Switch into Play mode after handling Login Start
Disable most of Craft.Net.Client

I need to focus on testing Craft.Net.Networking, so I'm disabling all
but the basic parts of Craft.Net.Client so that I can get that done more
easily.