TODOs 20180904

TODOs-20180904

External deserialize library:

• deploy a external library so a third-party contract can deserialize the parameter data of submitRings function

Broker:

• can place a order
• can cancel its orders
• the original owner should approve its token to our delegate contract first.

On-chain order book, add test case:

• on-chain order can be traded with another on-chain order
• on-chain order can be traded with off-chain order
• on-chain order can be created by a external contract

Token registry:

• see Token registry

Js simulator:

• print detailed diagnostic information for a ring
• *add UI interface

Interceptor:

• *design

Fee model:

• add a controller in feeHolder, the controller can withdraw all tax and burn it
• add test cases