Adds file structure for use cases #596

[snehajalukar]

This commit adds additional file structure by organizing use cases into one folder, as suggested in #596.

• Created a Use Cases Directory
• Put a README.md in that directory
• Made a file in the new directory for each individual Use Case from USE_CASES.md, copied the content to this file
• For each file I created, I linked to it from the README.md
• Organized the links in the README by type (email cases and non mail cases)
• Made sure the names of the files I created are related to the Use Case

Thank you!

[SendGridDX]

All committers have signed the CLA.

[thinkingserious]

Hello @shriyash,

Thanks again for the PR!

We appreciate your contribution and look forward to continued collaboration. Thanks!

Team SendGrid DX

[mbernier]

@shriyash

If you are interested, we would love the opportunity to talk to you about Hacktoberfest and our API libraries.

Our agenda would be: Explore what you liked and is there anything we can do to improve?

You can grab a time on my calendar that works for you and we can have a chat on Google Hangout or Skype. If you prefer, you can email me using my GitHub username at my company’s domain.

Thank you so much,

Matt Bernier - @mbernier - SendGrid Developer Experience Product Manager
Elmer Thomas - @thinkingserious - SendGrid Developer Experience Engineer
@sendgrid