docs(tutorial): add dart version of toh tutorial

[kasperpeulen]

@kwalrath in this PR, I just focused on getting the Dart version up to date with the typescript version

In the other PR I ported the end result to dart, but it seems like this code was only used for plnkr, or maybe it will be used for the last part (toh-pt5), but this is not yet done for typescript it seems.

[zoechi]

should be Tires instead of constructor

[kasperpeulen]

Oh oopz @zoechi I have only converted toh-1 up to toh-4 to dart.

I first just copied all the ts source files from the ts directory to the dart directory ,but I think the files about DI (dependency injection) shouldn't actually be here, so I removed them now (should probably also removed from the ts source).

Also toh-5 is not converted, because the ts version is not yet finished.

[zoechi]

=== not valid Dart

[kasperpeulen]

thanks, fixed, (will push later)

[zoechi]

The toh-pt5.jade file is still included, is this intentional?

[zoechi]

TS ===

[kasperpeulen]

@zoechi I removed that file as well now, and fixed the other comments.

[zoechi]

shouldn't this use async / await ?

[zoechi]

This is ok, it uses hero_service_1.dart where the value is returned sync.

[zoechi]

I did just a shallow review but now LGTM

[kwalrath]

Taking a very belated look now...

[kwalrath]

@kasperpeulen could you please git rebase upstream/master, resolve any conflicts, and push? If that's not practical, I guess we should start a new PR.

You can rename your .jade files to *-NEW.jade to get around some of the conflicts. And just drop the _data.json changes.

[kwalrath]

Just FYI, I'm copying down the toh-1 code to submit in a separate PR.

[kwalrath]

Closing, now that all changes have gotten into merged PRs. Thank you, @kasperpeulen!