Initial distributor implementation

appengine/cmd/dm/doc.go

 // Copyright 2015 The LUCI Authors. All rights reserved.
 // Use of this source code is governed under the Apache License, Version 2.0
 // that can be found in the LICENSE file.
 
 // Package dm provides the implementation for the Dungeon Master (DM)
 // distributed dependency scheduling service. It is split into the following
 // subpackages:
 //   enums - Simple state enumerations and their state machine restrictions.
 //   types - Types common to the other packages.
 //   model - These objects are the datastore model objects for DM.
 //   mutate - Tumble mutations for DM, a.k.a. DM's state machine. Each mutation
 //     represents a single node in DM's state machine.
 //   display - Objects that are returned as JSON from the various service
 //     endpoints. These objects are intended to be consumed by machine clients.
 //   service - The actual Cloud Endpoints service.
 //   frontend - The deployable appengine app. For Technical Reasons (tm), almost
 //     zero code lives here, it just calls through to code in service.
+//   distributor - Definition of the Distributor interface, and implementations
+//     (such as swarming_v1).
 //
 // For more information on DM itself, check out https://github.com/luci/luci-go/wiki/Design-Documents
 package dm