server: Add default config generator.
Add pkg: id.
Add pkg: command.
Add pkg: command/vanilla.
config: Fix Config.Save method.

SortedMap produces pretty-printable results, not the ones the "parser"
was expecting.
config: Refactor SortedMap -> PrettyMap.
types/minecraft: Forgot to remove debug stmt.
Add pkg: id.
proto/packet: Modified some S->C packets.

- EntityLook, EntityTeleport and EntityHeadLook all store pos and look
in a more saner way.
Add pkg: util/abs.
server: Massive changes to handlers.

- Refactor handler signature.
- Chat almost 100% feature complete.
- Send proper responses on some Pos/Look packets.
minero: Updated server version to 1.5.1.
server + server/player: Latest server changes.
server: Delete players from player list.
bin/minero: Add pkg docs.
bin/miproxy: Add pkg docs.
util/abs: Add pkg docs.
proto/packet: EntityNamedSpawn 0x14 use util/abs.
proto/auth: Remove unnecessary comment line.
server: Refactor out login procedure.