WRT PR #3 - Module evaluation ordering

[bmeck]

This is the place to discuss specifics of the order in which modules will be evaluated while mixing CommonJS (CJS) and EcmaScript (ES) modules. The proposal itself can be seen in PR #3.

Discussions here should regard:

• Order of module evaluation execution
• The dependency graph of a module and possible problems mixing declarative pre-order evaluation and imperative in-order evaluation.

It should not discuss import/export conversion, module path resolution, or detecting file mode.