Add "downloads" badges

Author: jjonescz

README.md

@@ -2,6 +2,10 @@
 
 [![Build
 status](https://dev.azure.com/jjones/gtm-visualstudio-plugin/_apis/build/status/gtm-visualstudio-plugin-CI?branchName=master)](https://dev.azure.com/jjones/gtm-visualstudio-plugin/_build/latest?definitionId=21&branchName=master)
+[![Downloads
+(Marketplace)](https://vsmarketplacebadge.apphb.com/downloads/jjones.gtm-visualstudio-plugin.svg?label=downloads%20%28Marketplace%29)](https://marketplace.visualstudio.com/items?itemName=jjones.gtm-visualstudio-plugin)
+[![Downloads
+(GitHub)](https://img.shields.io/github/downloads/jjonescz/gtm-visualstudio-plugin/total?label=downloads%20%28GitHub%29)](https://github.com/jjonescz/gtm-visualstudio-plugin/releases)
 
 [Git Time Metric](https://github.com/git-time-metric/gtm) plugin for [Visual
 Studio](https://visualstudio.com/).