Add streaming notes to update example file

[vmatyus]

PR summary

Fixes: <! -- link to issue -->

Note: An existing issue is required before opening a PR.

PR Checklist

Please make sure that your PR fulfills the following requirements:

• The commit message follows the
  Angular Commit Message Guidelines.
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• New tests
• Build/CI related changes
• Documentation content changes
• Other (please describe)

What is the current behavior?

What is the new behavior?

Add stream handling examples in note comments to update document example.

Does this PR introduce a breaking change?

• Yes
• No

Other information

[codecov]

Codecov Report

Merging #102 (a4b5e0b) into master (17d1ec9) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #102   +/-   ##
=======================================
  Coverage   92.24%   92.24%           
=======================================
  Files           8        8           
  Lines        7041     7041           
=======================================
  Hits         6495     6495           
  Misses        546      546           

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[mojito317]

LGTM! +1

[emlaver]

Looks good

[emlaver]

@vmatyusGitHub can we update the byte stream comments in the other SDKs?

[vmatyus]

Updated also other language examples and unified the variable names to documentAsByteStream:

node:

• IBM/cloudant-node-sdk@b81b399
• IBM/cloudant-node-sdk@4e39782

go:

• IBM/cloudant-go-sdk@23a277d

java:

• IBM/cloudant-java-sdk@3fff1fe

[vmatyus]

Thank you for reviewing! 🙂