[SL.Core] Added some of the badges to the README.

README.md

@@ -1,2 +1,10 @@
-# Core
+# SixLabers.Core
-Point, Rectangle, Size Primitives for use across SixLabors libraries.
+
+**SixLabors.Core** provides classes for use across SixLabors libraries.
+
+[![codecov](https://codecov.io/gh/SixLabors/Core/branch/develop/graph/badge.svg)](https://codecov.io/gh/SixLabors/Core)
+[![GitHub license](https://img.shields.io/badge/license-Apache%202-blue.svg)](https://raw.githubusercontent.com/SixLabors/Core/master/LICENSE)
+
+[![GitHub issues](https://img.shields.io/github/issues/SixLabors/Core.svg)](https://github.com/SixLabors/Core/issues)
+[![GitHub stars](https://img.shields.io/github/stars/SixLabors/Core.svg)](https://github.com/SixLabors/Core/stargazers)
+[![GitHub forks](https://img.shields.io/github/forks/SixLabors/Core.svg)](https://github.com/SixLabors/Core/network)