add SpeciesEvolver introduction tutorial#84

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nathanlyons wants to merge 18 commits intonextfrom

nathanlyons/species_evolution_tutorial

Commits on May 2, 2018

clade identifiers explained
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Commits on May 3, 2018

Commits on May 4, 2018

zones explained in a table
nathanlyons
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Commits on May 7, 2018

removed conflicts in last commit
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Commits on May 10, 2018

DataFrames explained
nathanlyons
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Commits on May 15, 2018

Commits on Sep 23, 2019

initial commit of SpeciesEvolver customization
nathanlyons
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Commits on Nov 7, 2019

plot zones by color
nathanlyons
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Commits on Nov 23, 2019

improvements to text
nathanlyons
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Commits on Nov 29, 2019