Improve deploy and export API and docs

[philippjfr]

No description provided.

[codecov-io]

Codecov Report

Merging #269 into master will decrease coverage by 0.17%.
The diff coverage is 18.42%.

@@            Coverage Diff             @@
##           master     #269      +/-   ##
==========================================
- Coverage   89.17%   88.99%   -0.18%     
==========================================
  Files          34       34              
  Lines        5541     5554      +13     
==========================================
+ Hits         4941     4943       +2     
- Misses        600      611      +11

Impacted Files	Coverage Δ
setup.py	0% <ø> (ø)	⬆️
panel/viewable.py	68.33% <18.42%> (-2.4%)	⬇️

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