support bool as dtype

[ajtritt]

Motivation

Fix #658

Checklist

• Have you checked our Contributing document?
• Have you ensured the PR description clearly describes problem and the solution?
• Is your contribution compliant with our coding style ? This can be checked running flake8 from the source directory.
• Have you checked to ensure that there aren't other open Pull Requests for the same change?
• Have you included the relevant issue number using #XXX notation where XXX is the issue number ?

[codecov]

Codecov Report

Merging #691 into dev will increase coverage by 0.19%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##              dev     #691      +/-   ##
==========================================
+ Coverage   74.37%   74.57%   +0.19%     
==========================================
  Files          58       58              
  Lines        6774     6776       +2     
  Branches     1397     1398       +1     
==========================================
+ Hits         5038     5053      +15     
+ Misses       1338     1332       -6     
+ Partials      398      391       -7

Impacted Files	Coverage Δ
src/pynwb/form/backends/hdf5/h5tools.py	68.79% <ø> (+0.7%)	⬆️
src/pynwb/form/spec/spec.py	78.64% <ø> (ø)	⬆️
src/pynwb/form/build/map.py	74.97% <0%> (+0.21%)	⬆️
src/pynwb/ecephys.py	97.32% <0%> (+0.92%)	⬆️
src/pynwb/form/utils.py	87.35% <0%> (+1.47%)	⬆️
src/pynwb/form/container.py	82.25% <0%> (+1.61%)	⬆️

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[bendichter]

@ajtritt is this ready to go? Are there other things we need to change?

[ajtritt]

@bendichter yes... someone just needs to review it ;)

[bendichter]

I'd like to add a test for this