Added VS Marketplace badges

Author: fwcd

README.md

@@ -1,6 +1,8 @@
 # KotlinLanguageServer
 A [language server](https://microsoft.github.io/language-server-protocol/) featuring smart code completion, diagnostics, hover, document symbols, method signature help and more for Kotlin and a VSCode extension that uses the language server.
 
+[![Version](https://vsmarketplacebadge.apphb.com/version-short/fwcd.kotlin.svg)](https://marketplace.visualstudio.com/items?itemName=fwcd.kotlin)
+[![Installs](https://vsmarketplacebadge.apphb.com/installs-short/fwcd.kotlin.svg)](https://marketplace.visualstudio.com/items?itemName=fwcd.kotlin)
 [![Build Status](https://travis-ci.org/fwcd/KotlinLanguageServer.svg?branch=master)](https://travis-ci.org/fwcd/KotlinLanguageServer)
 
 ![Icon](Icon128.png)