Added a README and the Encoding field.

DESCRIPTION

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README.md

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+# Utilities for handling single-cell droplet datasets
+
+|Environment|Status|
+|---|---|
+|[BioC-release](https://bioconductor.org/packages/release/bioc/html/DropletUtils.html)|[![Release OK](https://bioconductor.org/shields/build/release/bioc/DropletUtils.svg)](https://bioconductor.org/checkResults/release/bioc-LATEST/DropletUtils/)|
+|[BioC-devel](https://bioconductor.org/packages/devel/bioc/html/DropletUtils.html)|[![Devel OK](https://bioconductor.org/shields/build/devel/bioc/DropletUtils.svg)](https://bioconductor.org/checkResults/devel/bioc-LATEST/DropletUtils/)|
+
+The **DropletUtils** package provides a number of utility functions for handling single-cell (RNA-seq) data from droplet technologies such as 10X Genomics.
+This includes data loading from count matrices or molecule information files, identification of cells from empty droplets, removal of barcode-swapped pseudo-cells, and downsampling of the count matrix.
+Check out the [Bioconductor landing page](https://bioconductor.org/packages/DropletUtils) for more details.