helper-less async

[linclark]

From nodeschool/discussions#181:

helper-less async, each exercise presents asynchronous challenges of increasing difficulty and your job is to solve them without using require for anything other than local modules. Teach async programming the hard way...

for each exercise it would analyse the program source and make sure you have no non-core and non-local require() calls. The point being to force you to actually understand it instead of hiding behind a lib (or a pattern like promises .....)

Does anyone have a suggested outline for the lesson?