Missing conda recipes

[Zethson]

• [x] cellhashr
• [x] gmmdemux
• [ ] Souporcell
• [x] Vireo
• [x] cellsnp (just cellsnp lite in recipes)
• [x] freemuxlet
• [x] scsplit

[mari-ga]

Updated list for missing tools:

• [ ] cellhashr
• [ ] gmmdemux
• [ ] Souporcell
• [ ] Vireo
• [ ] cellsnp (just cellsnp lite in recipes)
• [ ] freemuxlet
• [ ] scsplit

[mari-ga]

Bioconda package Popscle (https://bioconda.github.io/recipes/popscle/README.html) already includes freemuxlet and demuxlet