readme updates

README.md

@@ -9,28 +9,23 @@ serialisable cache from multiple different ones.
 
 **This plugin** provides a simple function to merge those files in a safe way.
 
-## Usage
+## Usage (sbt 1.3+)
 
-For sbt 1.3+ add `sbt-assembly-log4j2` as a dependency in
-`project/assembly.sbt` alongside [`sbt-assembly`][sbt-assembly]:
-
-
-`project/plugins.sbt`:
+project/plugins.sbt:
 ```scala
 addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "2.1.1")
 addSbtPlugin("com.michaelpollmeier" % "sbt-assembly-log4j2" % "1.1.3")
 ```
 
-`build.sbt`
+build.sbt
 ```scala
 assembly/assemblyMergeStrategy := {
   case "META-INF/org/apache/logging/log4j/core/config/plugins/Log4j2Plugins.dat" =>
     sbtassembly.Log4j2MergeStrategy.plugincache
 }
 ```
 
-Latest version of [sbt-assembly](https://github.com/sbt/sbt-assembly#setup)
-Requires sbt 1.3+
+Latest version of sbt-assembly: see https://github.com/sbt/sbt-assembly#setup
 
 ## Credits
 * [Stathis Charitos](https://github.com/stathischaritos) for the idea and [creating the first version](https://github.com/idio/sbt-assembly-log4j2). Unfortunately it's unmaintained and only available for a outdated sbt and sbt-assembly versions.