GSoC 2020: jsondecode

Hello everyone,

I started writing code for jsondecode function [1] in a new branch called
"json". (Sorry for the late  notification. I thought "watch" option for a
repo shows those changes *:-)*  )

Right now, the function fails only 6 tests out of 31 tests. Specifically,
what remains is to decode arrays that contain arrays only.

I have also completed my first evaluation [2].

I am waiting for your feedback and suggestions.

Best regards,
Abdallah


[1]
https://github.com/Abdallah-Elshamy/octave/blob/json/libinterp/corefcn/jsondecode.cc
[2] https://developers.google.com/open-source/gsoc/help/evaluations