Merge pull request #1 from ThomasRubini/gradle_tasks

Update gradle tasks

build.gradle

@@ -1,10 +1,21 @@
 plugins {
     id 'java'
+    id 'application'
 }
 
 group 'fr.amu.puit'
 version '1.0-SNAPSHOT'
 
+mainClassName = 'fr.amu.puit.Main'
+
+jar{
+    manifest {
+        attributes(
+                'Main-Class': mainClassName
+        )
+    }
+}
+
 repositories {
     mavenCentral()
 }