Export inner modules as objects

[cristianoc]

This implements a feature request from @sync, to give more idiomatic access to inner modules from JS.

When an inner module (i.e. a module declared within a file) contains values exported to JS, also generate an object with the name of the module and the exported values.

So for example:

module Inner = {
  [@genType]
  let x = 34;
}

should generate some additional code:

export const Inner : { x : number } = { x : Inner_x };

If the new representation of inner modules is available, this is optimized to:

export const Inner : { x : number } = ThisFileBS.Inner;

[cristianoc]

@sync there's some of it, but happy to let you complete

[sync]

yes i just ran the branch and could not see a difference so i think i'll be able to have a play around :-)

[cristianoc]

@sync
Just one more commit. Sent.

[cristianoc]

The commit message contains a few TODOs.
733a6db

[sync]

thank you so much

[sync]

Ok will have a look at this first thing in the morning tomorrow (in about 8 hours)

[sync]

I am slowly making progress here: #255 still have plenty to do :-)

[cristianoc]

@sync thanks a lot -- that's great.
I'll make little comments along the way from time to time.

[sync]

Please do and also around code style etc... like i not in love with the StringHelper :-(

[cristianoc]

Thanks a lot @sync for suggesting the feature, and even implementing a good chunk of it!

[cristianoc]

Closing as nearly ready to merge the PR.