Add code section for MATLAB expressions in "Remote Read" tutorial

[ehennestad]

Motivation

Cosmetic change to tutorial. This unrelatedly also fixes an issue when compiling matnwb into a standalone application as reported in issue #564

How to test the behavior?

N/A

Checklist

• Have you ensured the PR description clearly describes the problem and solutions?
• Have you checked to ensure that there aren't other open or previously closed Pull Requests for the same change?
• If this PR fixes an issue, is the first line of the PR description fix #XX where XX is the issue number?

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.63%. Comparing base (afd34b0) to head (7511c33).
Report is 3 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #610   +/-   ##
=======================================
  Coverage   90.63%   90.63%           
=======================================
  Files         106      106           
  Lines        4689     4689           
=======================================
  Hits         4250     4250           
  Misses        439      439           

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