Added a bash file, for Linux "support"

execute.bash

@@ -0,0 +1,19 @@
+#!/bin/bash
+
+java -jar CSGOCaseStatsViewer-1.0.5-jar-with-dependencies.jar
+err_code=$?
+
+if [ $err_code -eq 1 ]; then
+    echo "It looks like you cloned the repository instead of downloading the newest release."
+    echo "Download it from https://github.com/cantryDev/CSGOCaseStatsViewer/releases/latest"
+    echo "You will be redirected to the download page in 10 seconds.."
+    sleep 10
+    xdg-open https://github.com/cantryDev/CSGOCaseStatsViewer/releases/latest
+elif [ $err_code -eq 127 ]; then 
+    # If the java command isn't found
+    echo "You need to have Java 1.8 or higher installed on your system to use this program"
+elif [ $err_code -eq 130 ]; then
+    # If we kill the program with Ctrl + C
+    echo ""
+    echo "Thanks for using me ! :)"
+fi