Merge pull request satijalab#1549 from satijalab/develop

Seurat v3.0.1

Merge pull request satijalab#1375 from satijalab/release/3.0

Seurat v3

Update CRAN comments

Update cran-comments

Update cran-comments

Add CRAN comments

swap MetaDE for metap, remove NMF dependency

Update README.md

Merge branch 'develop'

update version to release 2.0