Add proper changelog

Author: apeltzer

CHANGELOG.md

@@ -9,8 +9,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 ### `Added`
 
 ### `Fixed`
-* [#145](https://github.com/nf-core/eager/issues/145) - Added Picard Memory Handling [fix](https://github.com/nf-core/eager/issues/144)
-
+* [#145](https://github.com/nf-core/eager/pull/145) - Added Picard Memory Handling [fix](https://github.com/nf-core/eager/issues/144)
+* [#147](https://github.com/nf-core/eager/pull/147) - Fix Samtools Index for [large references](https://github.com/nf-core/eager/issues/146)
 
 ## [2.0.5] - 2019-01-28