Htsget BAM to implementation for file interface

[aaliomer]

I created a file interface for htsget incase you're using a file system instead of google cloud
I didn't change the previous code and I didn't add documentation for it (pretty self explanatory)

If this pull request gets accepted, I'll add modifications to the README

I'm looking into the cram implementation in the coming future

[googlebot]

Thanks for your pull request. It looks like this may be your first contribution to a Google open source project (if not, look below for help). Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

📝 Please visit https://cla.developers.google.com/ to sign.

Once you've signed (or fixed any issues), please reply here (e.g. I signed it!) and we'll verify it.

---

What to do if you already signed the CLA

Individual signers

• It's possible we don't have your GitHub username or you're using a different email address on your commit. Check your existing CLA data and verify that your email is set on your git commits.

Corporate signers

• Your company has a Point of Contact who decides which employees are authorized to participate. Ask your POC to be added to the group of authorized contributors. If you don't know who your Point of Contact is, direct the Google project maintainer to go/cla#troubleshoot (Public version).
• The email used to register you as an authorized contributor must be the email used for the Git commit. Check your existing CLA data and verify that your email is set on your git commits.
• The email used to register you as an authorized contributor must also be attached to your GitHub account.

[aaliomer]

CLA signed

[googlebot]

We found a Contributor License Agreement for you (the sender of this pull request), but were unable to find agreements for all the commit author(s) or Co-authors. If you authored these, maybe you used a different email address in the git commits than was used to sign the CLA (login here to double check)? If these were authored by someone else, then they will need to sign a CLA as well, and confirm that they're okay with these being contributed to Google.
In order to pass this check, please resolve this problem and have the pull request author add another comment and the bot will run again. If the bot doesn't comment, it means it doesn't think anything has changed.

[aaliomer]

i'm the only one who wrote code

[aaliomer]

@gkelly @deflaux @google-admin
Hello guys. Can you help me with this? I signed the CLA and im the only one who made the commits

[kemp-google]

@aaliomer

Thanks for reaching out. I took a look and, after discussing it with our product manager (@sheffi), this doesn't look like it really aligns with our product roadmap.

This server is intended as an implementation of HTSGET on top of Google's Cloud technologies. A local file-based implementation isn't something that we are looking to add to this product at this time.

If you need this functionality for a project of your own and would like to use our server as a foundation, I suggest keeping your changes in a fork that can be used by other people with similar problems.

Thanks,
Aaron