Update readme and add example.trees

[benjeffery]

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[github-actions]

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edges.png

mutations.png

nodes.png

out_edges.png

out_mutations.png

out_nodes.png

overview.png

tables.png

trees.png

[coveralls]

Pull Request Test Coverage Report for Build 12225651482

Details

• 1 of 1 (100.0%) changed or added relevant line in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 89.251%

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Totals
Change from base Build 12225431543:	0.0%
Covered Lines:	739
Relevant Lines:	828

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💛 - Coveralls

[jeromekelleher]

Shall we tszip the example? 1.5Mb is a bit porky

[benjeffery]

Shall we tszip the example? 1.5Mb is a bit porky

My concern there was keeping the .tsbrowse up to date. But happy to add it if you think that's not a concern.

[jeromekelleher]

You can preprocess a tszip file just as well as a trees file, right? So still preprocess, just store the smaller example file.