partial update readme
Order.checkIfEndAll() -> Order.checkIsEndAll()
Contractor.distribute() -> LaborManager.take()
match platforms, still some bug
Order.labors = {laborId: labor} => {platform: {instance: order, isFinished: false}}
add Order.emitReports() and modify some log text
improve Order.checkIsEndAll()
simplify LaborManager.removeLabor()
fix platform match bug