Clean up findModulePath
Clean up findModulePath

Separating "what to traverse" from "how to traverse and what to do with it "
in findModulePath.  It may also fix one not-yet-found bug (absolute ids
weren't loaded when dirs.length = 0).

dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node