Added console warning for deprecated config options

CHANGELOG.md

@@ -70,6 +70,7 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 - Added ability to configure electronOptions
 - Calendar module: option to hide private events
 - Add root_path for global vars
+- Added console warning on startup when deprecated config options are used 
 
 ### Updated
 - Modified translations for Frysk.

config/.gitignore

@@ -1,2 +1,3 @@
 *
 !config.js.sample
+!deprecated.js

config/deprecated.js

@@ -0,0 +1,12 @@
+/* Magic Mirror Deprecated Config Options List
+ *
+ * By Michael Teeuw http://michaelteeuw.nl
+ * MIT Licensed.
+ */
+
+var deprecated = [
+    'kioskmode'
+];
+
+/*************** DO NOT EDIT THE LINE BELOW ***************/
+if (typeof module !== 'undefined') {module.exports = deprecated;}

js/app.js

@@ -56,6 +56,7 @@ var App = function() {
 		try {
 			fs.accessSync(configFilename, fs.F_OK);
 			var c = require(configFilename);
+			checkDeprecatedOptions(c);
 			var config = Object.assign(defaults, c);
 			callback(config);
 		} catch (e) {
@@ -72,6 +73,21 @@ var App = function() {
 		}
 	};
 
+	var checkDeprecatedOptions = function(userConfig) {
+		var deprecatedOptions = require(__dirname + "/../config/deprecated.js");
+		var usedDeprecated = [];
+
+		deprecatedOptions.forEach(function(option) {
+			if (userConfig.hasOwnProperty(option)) {
+				usedDeprecated.push(option);
+			}
+		});
+
+		if (usedDeprecated.length > 0) {
+			console.error("WARNING! Your config is using deprecated options: " + usedDeprecated.join(", ") + ". Check README and CHANGELOG for more up-to-date ways of getting the same functionality.");
+		}
+	}
+
 	/* loadModule(module)
 	 * Loads a specific module.
 	 *