Add HTTP Basic Auth support

[swarnat]

Hy,

During setup of a new shop HTTP Basic Authentication is active in some case.
This modification implement the HTTP Basic Authentication to allow the usage of the REST API also within such setup.
It is already tested in my agency. I only change code formatting.

If you find it useful, feel free to implement the code.
If not, I will understand if the situation is too special to implement globally.

Stefan

[wider2]

Good day.
This application is well enough, but...
I agree that Basic Auth no longer works properly
When I check connection with "print_r($client->index->get());" and it is look like correct

But blank screen without json data returned with "print_r( $client->products->get() );"
Is it normal???

Can you upload last working version on GitHub?