Add .codeclimate.yml file

[rzats]

Fixes #341 #342

This is a standard (ie autogenerated) Java-based file that runs Checkstyle, PMD and fixme on all source files. Let me know if any of this needs to be tweaked :)

[SendGridDX]

All committers have signed the CLA.

[rzats]

@mbernier I've updated this to match sendgrid/smtpapi-java#43

[thinkingserious]

Hello @rzats,

Thanks again for the PR!

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

Team SendGrid DX

[mbernier]

@rzats,

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