Add gfatools

[natir]

Add gfatools tools for manipulating sequence graphs in the GFA and rGFA formats

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[natir]

@BiocondaBot please add label

[druvus]

@bioconda-bot please fetch artifacts

[BiocondaBot]

Package(s) built on CircleCI are ready for inspection:

Arch	Package	Repodata
linux-64	gfatools-0.4-hed695b0_0.tar.bz2	repodata.json
osx-64	gfatools-0.4-hbbe82c9_0.tar.bz2	repodata.json

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You may also use conda to install these:

• For packages on linux-64:

conda install -c https://136270-42372094-gh.circle-artifacts.com/0/tmp/artifacts/packages <package name>

• For packages on osx-64:

conda install -c https://136274-42372094-gh.circle-artifacts.com/0/tmp/artifacts/packages <package name>

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Docker image(s) built:

Package	Tag	Install with docker
gfatools	0.4--hed695b0_0	show curl "https://136270-42372094-gh.circle-artifacts.com/0/tmp/artifacts/images/gfatools%3A0.4--hed695b0_0.tar.gz" | gzip -dc | docker load

[druvus]

Could you ask for a license by author?

[natir]

I'm going to open an issue lh3/gfatools#17

[dpryan79]

@bioconda-bot please merge

[BiocondaBot]

I will attempt to upload artifacts and merge this PR. This may take some time, please have patience.