add py3dmol plot

[cbouy]

Closes #119

[codecov[bot]]

Codecov Report

Merging #148 (02a7f66) into master (f213bfe) will increase coverage by 0.25%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #148      +/-   ##
==========================================
+ Coverage   95.54%   95.80%   +0.25%     
==========================================
  Files          18       19       +1     
  Lines        1279     1358      +79     
==========================================
+ Hits         1222     1301      +79     
  Misses         57       57              

Files Changed	Coverage Δ
prolif/fingerprint.py	98.22% <100.00%> (+0.04%)	:arrow_up:
prolif/plotting/complex3d.py	100.00% <100.00%> (ø)