Merge pull request #417 from sortega/headless

Add a cancel order command
Bump akka version to 2.3.7

Maintenance release fixing bugs and improving perf
http://akka.io/news/2014/11/12/akka-2.3.7-released.html
Bump utilities versions

Bump some utility library versions to catch up with the world.
Merge pull request #418 from sortega/bump

Bump some dependencies
Use just “list” to list orders
Fix a missing DLL file in Windows build
Add a `Changelog` file and update it with latest change
Merge pull request #420 from apoloval/port/cf-156

Port of #419
Extract code from CancelOrderCommand

Extract order id validation from the production code and a mock class
from its test for reuse. ShowOrderDetailsCommand shares that behaviour
and will benefit from this.
Add a show command

It displays the details of an order including related exchanges
Fix typo on domain model
Save history between runs
Merge pull request #421 from sortega/headless

Add list command and save the shell history