Add how to execute a flux via CLI (#90)

Author: dr0i

README.md

@@ -24,6 +24,10 @@ Run the tests (in `metafix/src/test/java`) and checks (`.editorconfig`, `config/
 
 `./gradlew clean check`
 
+To execute a Fix (embedded in a Flux) via CLI:
+
+`./gradlew :metafix-runner:run --args="$PWD/path/to.flux"`
+
 (To import the projects in Eclipse, choose `File > Import > Existing Gradle Project` and select the `metafacture-fix` directory.)
 
 ## Usage