[galaxy-commits] commit/galaxy-central: greg: Restrict the use of "orphan tool dependencies" in the Tool Shed. The designation of a ToolDependency into the "orphan" category has evolved over time, and is significantly restricted since the introduction of the TOOL_DEPENDENCY_DEFINITION repository type. This designation is still critical, however, in that it handles the case where a repository contains both tools and a tool_dependencies.xml file, but the definition in the tool_dependencies.xml file is in no w