Update first vis example notebook; use non-deprecated functions

[dweindl]

See #89

Also, clear notebook output to not litter the repository - will be run during doc build (#144).

[codecov-commenter]

Codecov Report

Merging #137 (c90fa76) into develop (a463194) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop     #137   +/-   ##
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  Coverage    77.73%   77.73%           
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  Files           27       27           
  Lines         2906     2906           
  Branches       718      718           
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  Hits          2259     2259           
  Misses         468      468           
  Partials       179      179           

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[plakrisenko]

Only small thing: the plots with an empty VS and with only 'plotId' column aren't the same as stated. In the former case there are three subplots and in the latter case everything is plotted together.

[dweindl]

Only small thing: the plots with an empty VS and with only 'plotId' column aren't the same as stated. In the former case there are three subplots and in the latter case everything is plotted together.

Thanks. Updated.