Add CSP compliance to plugins

Change-Id: Ia13082bbad5348c8cbb5f5cb976bfe32c9fe0a27
diff --git a/dev/js/src/api.js b/dev/js/src/api.js
index 75a4e68..cfc0625 100644
--- a/dev/js/src/api.js
+++ b/dev/js/src/api.js
@@ -107,7 +107,15 @@
   	let url  =  KorAP.URL + "/corpus?cq=" + encodeURIComponent(cq);
   	KorAP.API.getJSON(url, cb, "CorpusInfo: " + cq);
   };
-  
+
+
+  /**
+   * Retrieve a list of all plugin objects to
+   * establish in the frontend.
+   */
+  KorAP.API.getPluginList = function (url, cb) {
+    KorAP.API.getJSON(url, cb, "Plugin-List")
+  };
 
   /**
    * General method to retrieve JSON information