Miscellaneous fixes

[aakashdp6548]

Fixes #894 and #763. Also fixes the region encoder bug mentioned in #915.

[jeff-regier]

You mean #894, right? (#890 is a PR, not an issue)

[jeff-regier]

Looks good, thanks for fixes

[aakashdp6548]

Oops, yes I meant 894. Thanks!

[codecov]

Codecov Report

Merging #916 (5bfb94e) into master (417d4c1) will decrease coverage by 0.04%.
The diff coverage is 88.88%.

@@            Coverage Diff             @@
##           master     #916      +/-   ##
==========================================
- Coverage   95.82%   95.79%   -0.04%     
==========================================
  Files          25       25              
  Lines        3067     3066       -1     
==========================================
- Hits         2939     2937       -2     
- Misses        128      129       +1     

Flag	Coverage Δ
unittests	95.79% <88.88%> (-0.04%)	⬇️

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Files Changed	Coverage Δ
bliss/api.py	87.17% <ø> (ø)
bliss/encoder.py	96.98% <66.66%> (-0.49%)	⬇️
bliss/predict.py	99.52% <100.00%> (-0.01%)	⬇️
bliss/simulator/decoder.py	100.00% <100.00%> (ø)
bliss/unconstrained_dists.py	87.67% <100.00%> (ø)

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