Create Segmentation SDK structure for source and unit tests.

[dmandar]

No description provided.

[morganchen12]

Please wait for Ryan/Paul review before merging.

[paulb777]

Add to CI. #3115 is a good reference for the necessary changes.

[paulb777]

Should only depend on minor versions. Change to 4.1

[dmandar]

Done.

[paulb777]

If you like, the CI integration can wait until the PR to merge to master.

To add to CI for md-floc-master add the branch name to the bottom of .travis.yml.

[googlebot]

So there's good news and bad news.

👍 The good news is that everyone that needs to sign a CLA (the pull request submitter and all commit authors) have done so. Everything is all good there.

😕 The bad news is that it appears that one or more commits were authored or co-authored by someone other than the pull request submitter. We need to confirm that all authors are ok with their commits being contributed to this project. Please have them confirm that here in the pull request.

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[paulb777]

The diff is unmanageable now. One solution might be to merge master into md-floc-master.

If you haven't yet, review https://github.com/firebase/firebase-ios-sdk/blob/master/AddNewPod.md

[dmandar]

The diff is unmanageable now. One solution might be to merge master into md-floc-master.

If you haven't yet, review https://github.com/firebase/firebase-ios-sdk/blob/master/AddNewPod.md

Merged into md-floc-master. Glanced through the doc and made changes.

[googlebot]

CLAs look good, thanks!

ℹ️ Googlers: Go here for more info.