Add ErrorID and warningID for all user-facing code

[ehennestad]

Fix #11

Motivation

Fix issue

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?

[ehennestad]

Todo:

• Go through all calls to the assert function.
• Multiline error / warning calls negatively impacts coverage...

[codecov]

Codecov Report

Attention: Patch coverage is 35.00000% with 26 lines in your changes missing coverage. Please review.

Project coverage is 90.69%. Comparing base (5aa27d9) to head (b02f126).

Files with missing lines	Patch %	Lines
+file/Dataset.m	0.00%	4 Missing ⚠️
+file/fillProps.m	0.00%	4 Missing ⚠️
+file/Group.m	0.00%	2 Missing ⚠️
+file/fillValidators.m	50.00%	2 Missing ⚠️
+io/getBaseType.m	0.00%	2 Missing ⚠️
+io/writeCompound.m	0.00%	2 Missing ⚠️
+io/writeDataset.m	0.00%	2 Missing ⚠️
+misc/str2validName.m	0.00%	2 Missing ⚠️
+types/+util/checkDependent.m	0.00%	2 Missing ⚠️
+file/fillConstructor.m	50.00%	1 Missing ⚠️
... and 3 more

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #617      +/-   ##
==========================================
- Coverage   90.91%   90.69%   -0.22%     
==========================================
  Files         107      107              
  Lines        4753     4763      +10     
==========================================
- Hits         4321     4320       -1     
- Misses        432      443      +11     

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