Switch demo datasets to launch directly from URL

docs/posts/demo-data.md

@@ -5,8 +5,7 @@ description: Demo datasets
 ---
 
 # Example datasets
-**To download and use these datasets, run:**  
-`unzip [filename.zip]`
+**To use these datasets, run:**  
 `cellxgene launch [filename.h5ad] --open`
 
 ### Peripheral blood mononuclear cells
@@ -17,7 +16,10 @@ Healthy human PBMCs (10X).
 - File size: 19MB
 - [Raw data](http://cf.10xgenomics.com/samples/cell-exp/1.1.0/pbmc3k/pbmc3k_filtered_gene_bc_matrices.tar.gz)
 - [Processing](https://github.com/chanzuckerberg/cellxgene-vignettes/blob/master/dataset-processing/pbmc3k-processing.ipynb)
-- [Download](https://cellxgene-example-data.czi.technology/pbmc3k.h5ad.zip)
+- Launch:   
+```
+cellxgene launch https://cellxgene-example-data.czi.technology/pbmc3k.h5ad
+```
 
 ### Tabula muris
 20 organs and tissues from healthy mice (Smart-Seq2).  
@@ -28,7 +30,10 @@ Rich metadata and annotations.
 - File size: 174MB
 - [Raw data](https://figshare.com/projects/Tabula_Muris_Transcriptomic_characterization_of_20_organs_and_tissues_from_Mus_musculus_at_single_cell_resolution/27733)
 - [Processing](https://github.com/chanzuckerberg/cellxgene-vignettes/blob/master/dataset-processing/tabula-muris-processing.ipynb)
-- [Download](https://cellxgene-example-data.czi.technology/tabula-muris.h5ad.zip)
+- Launch:
+```
+cellxgene launch https://cellxgene-example-data.czi.technology/tabula-muris.h5ad
+```
 
 ### Tabula muris senis
 22 organs and tissues from healthy mice at ages 3mo, 18mo, 21mo, and 24mo (Smart-Seq2).  
@@ -39,4 +44,7 @@ Rich metadata and annotations.
 - File size: 3.9GB
 - Raw data [geo link coming soon!]
 - [Processing](https://www.biorxiv.org/content/10.1101/661728v1)
-- [Download](https://cellxgene-example-data.czi.technology/tabula-muris-senis.h5ad.zip)
+- Launch:
+```
+cellxgene launch https://cellxgene-example-data.czi.technology/tabula-muris-senis.h5ad
+```