#635 .workingwiki directory is a misnomer

[Lee Worden]

The makefiles are putting certain things (mostly .d files) in .workingwiki/ within the project directory.

When you export the project, you get more stuff in there, including the whole $(RESOURCES) directory.

All of that is done by ProjectEngine, not by WorkingWiki, and it's all used when we do working markup, which is not WorkingWiki. Some may question why there's a .workingwiki/ directory in there.

Maybe it should be called .projectengine? Or something else?