Added more instructions for readme

Author: SundermannC

README.md

@@ -2,14 +2,24 @@
 This repository can be used to analyze a batch of feature models using FeatureIDE. The feature models can be of any format that is supported by FeatureIDE, namely the FeatureIDE format (xml), SXFM, UVL, and DIMACS.
 As input a path to either a directory or a feature-model file is expected. If given a directory path, the tool computes the metrics for every feature model in the directory *recursively*.
 
+## Building
+
+The project is built using gradle. While you can use the provided wrapper `./gradlew`, you still need to [install gradle](https://docs.gradle.org/current/userguide/installation.html) on your system.
+
+For model counting, we use d4 for which we only provide a Linux binary. [Here](https://github.com/SoftVarE-Group/d4v2), we provide pre-built binaries for Windows, Mac, and Linux.
+
 ## Usage
 Only tested with Ubuntu 22.04LTS, binaries have to be recompiled!
 
-Call FeatureStepAnalysis with 
-    Mandatory argument([0]): Input path
-    Optional Argument([1]): Analysis category: All (chosen if not set), Default, Simple, CNF, Satzilla
-    Optional Argument([2]): Output path results
-    Optional Argument([3]): Output path time
-    Optional Argument([4]): Output path runstatus
+To run use `./gradlew run --args=<path> [OPTIONS]`
+
+Available options are:
+* Mandatory argument([0]): Input path
+* Optional Argument([1]): Analysis category: All (chosen if not set), Default, Simple, CNF, Satzilla
+* Optional Argument([2]): Output path results
+* Optional Argument([3]): Output path time
+* Optional Argument([4]): Output path runstatus
+
+An example executing all default analyses on all models in `models`:
 
-to execute all analysis on all files in the given path recursively.
+`./gradlew run --args=models default`