create tracker only when announce list is not empty
0.11.1
added a onready shorthand
0.12.0
extracted dht
extracted tracker and refactored dht
extracted metadata exchange
Merge pull request #56 from mafintosh/refactor

Refactoring
Move modules to lib/ subfolder
Refactor peer discovery, fix #57
Code style
Merge pull request #58 from mafintosh/refactor

Refactoring peer discovery
Block wires sending invalid pieces
Update doc
Keep a list of source wires
Implement bad piece strikes counter, #59
Swappable storage backend
Give the full options object to storage backend
Update doc
Merge pull request #60 from mafintosh/modular-storage

Swappable storage backend