render_as_json, making sorting fields optional

[ritikesh]

1. Added a render_as_json API - When you want a JSONified hash - useful when you want to modify the generated hash but require it to be JSONified
2. Added a configuration option to make sorting optional - for those who don't want to sort the fields by name but want it in the order it was defined. Bonus - adds a perf benefit.
3. Update readme with latest updates and some missing public API specs like render_as_hash, exclude..

[ritikesh]

@philipqnguyen @mcclayton
Hi guys, any updates here?

[mcclayton]

Thanks so much for your valuable contribution @ritikesh. Apologies for the delay in reviewing, been a little slow with the holidays 🦃

[ritikesh]

Thanks so much for your valuable contribution @ritikesh. Apologies for the delay in reviewing, been a little slow with the holidays 🦃

No worries, hope had a good time there. 😄

[ritikesh]

@mcclayton I've made the changes as suggested. Please let me know if you need anything else.

[ritikesh]

Hi guys, is there anything pending on this? @philipqnguyen @mcclayton

[AllPurposeName]

Looks great, thanks for making those changes.