Added Inorder recurrsion

[SudharshanRamanujam]

Description

Fixed issue #401

Type of change

Please delete options that are not relevant.

• [ ] Bug fix (non-breaking change which fixes an issue)

Checklist:

• [ ] My code follows the style guidelines of this project i.e. Pep8
• [ ] I have performed a self-review of my own code
• [ ] I have commented my code, particularly in hard-to-understand areas
• [ ] Any dependent changes have been merged and published in downstream modules
• [ ] I have squashed unnecessary commits