ConfigManager improvements. v0.0.1-alpha.1

Added new configuration option, launchDetached.
Added validation function to ConfigManager to add missing keys (due to updates).
Updated westeroscraft.json
Game process can now be detached from the launcher.

app/assets/js/processbuilder.js

@@ -44,9 +44,14 @@ class ProcessBuilder {
         console.log(args)
 
         const child = child_process.spawn(ConfigManager.getJavaExecutable(), args, {
-            cwd: ConfigManager.getGameDirectory()
+            cwd: ConfigManager.getGameDirectory(),
+            detached: ConfigManager.isLaunchDetached()
         })
 
+        if(ConfigManager.isLaunchDetached()){
+            child.unref()
+        }
+
         child.stdout.on('data', (data) => {
             console.log('Minecraft:', data.toString('utf8'))
         })