Badge with the link to the latest Kotlin/Native release (JetBrains#3203)

* tried to add link to the most recent release

* made more beautiful badge

* Update README.md

* made upper-case'd organisation names

README.md

@@ -1,5 +1,5 @@
 [![official project](http://jb.gg/badges/official.svg)](https://confluence.jetbrains.com/display/ALL/JetBrains+on+GitHub)
-
+[![version](https://img.shields.io/badge/dynamic/json.svg?color=orange&label=latest%20version&query=%24.tag_name&url=https%3A%2F%2Fgithub.com%2FJetBrains%2Fkotlin-native%2Freleases%2Flatest)](https://github.com/JetBrains/kotlin-native/releases/latest)
 # Kotlin/Native  #
 
 _Kotlin/Native_ is an LLVM backend for the Kotlin compiler, runtime