Improving Linking Mechanism

[caridy]

• RequestSatisfy and RequestLink resolve to undefined, in preparation for the next refactor.
• ModuleEvaluation() have to invoke evaluation once per module, and in all its dependencies.
• If optionalInstance is callable, it should return a module namespace exotic object.
• Removing the optional 3rd argument of ModuleStatus(), the same can be accomplish by creating a new ModuleStatus instance and calling resolve() on it.
• get ModuleStatus.prototype.originalKey to facilitate inspection of module status objects.
• Accessing the hooks right before using them instead of doing it in a previous turn.
• factories can produce namespace objects that might require declaration and evaluation.
• Editorial fixes and extra validation/assertions.

[dherman]

LGTM, I just have the one question about upgrading, and the one nit of s/key/originalKey/. r+ with those resolved. :shipit: