Export/import Query Edititor steps

Export/import Query Edititor steps so that I may be able to modify flat MDX project files. Trying to modify queries is one of the more painful tasks, and it is all too easy to modify a step which impacts subsequent steps. A flat presentation of a table would make it easier to keep intermediate states during development, mass renames across steps, and open the possibility for 3rd party tools to make writing the queries easier.