Gets the manual task files that were included in this return package.
These files do not necessarily all belong to the same manual task, but they should all belong to the same project.
Also, these file can be a subset of the files that were originally sent out in a project project package.
Namespace: Sdl.ProjectAutomation.CoreAssembly: Sdl.ProjectAutomation.Core (in Sdl.ProjectAutomation.Core.dll) Version: 1.0.0.0 (1.2.3064.0)