fix_3/#90 - support of relative files in UriReader

[monsieurtanuki]

Impacted files:

• api_addProductImage_test.dart: Files are now relative
• api_getProduct_test.dart: Files are now relative
• api_ocrIngredients_test.dart: Files are now relative
• UriReader.dart: now support relative Files

[MohamedFBoussaid]

You have right @monsieurtanuki it is better this way.

Can you also please update example/main.dart ? Thanks

[monsieurtanuki]

Thank you @MohamedFBoussaid!
Unfortunately I'm not sure if I can change example/lib/main.dart, where we're not exactly dealing with tests that have access to files. And asset files is not supported either by UriReader.
I'll try today.

[monsieurtanuki]

@MohamedFBoussaid I've just had a look at the code of main.dart in details: it's full of hard-coded values, probably not usable without minor changes. And the message is explicit enough I think: Uri.parse("Path to you image").
Unless we receive tons of mails of developers complaining that they have no idea what to put there, I think we can skip this final fix. Therefore, I'm finished :)

[MohamedFBoussaid]

Yeah I guess it is fine to go without it.

Because even the change that I am proposing, will not change anything just to make it clear how to use it.

We can ignore that for the moment.

Thanks @monsieurtanuki