sceneEngine: Update docs for latest changes

Signed-off-by: Florian Hotze <florianh_dev@icloud.com>

README.md

@@ -54,15 +54,15 @@ Scene defintion works with an array of objects.
 ```javascript
 const sceneDefinition = {
   controller: 'scene call item name',
-  scenes: [ // For each numeric state of the sceneItem one object.
-    { // Object for the value 1 of the sceneItem.
+  scenes: [ // For each numeric state of the controller Item one object.
+    { // Object for the value 1 of the controller Item.
       value: 1,
       targets: [ // Target states of items in the scene. Parameters explained later.
-        { item: 'Florian_Licht', value: 'ON', required: true },
+        { item: 'Florian_Licht', value: 'ON', required: true, conditionFn: function() { return parseFloat(items.getItem('Helligkeit').state) >= 10000; } },
         { item: 'Florian_LED_Stripes', value: 'OFF', required: false }
       ] 
     },
-    { // Object for the value 15 of the sceneItem.
+    { // Object for the value 15 of the controller Item.
       value: 15,
       targets: [ // Target states of items in the scene. Parameters explained later.
         { item: 'Florian_LED_Stripes', value: 'ON', required: true }
@@ -71,21 +71,16 @@ const sceneDefinition = {
   ]
 };
 ```
-__sceneTargets__' parameters
-Identifier | Purpose | Type | Required
--|-|-|-
-`item` | Name of a scene member. | String | yes
-`value` | Target state of that member. | String | yes
-`required` | Whether that member must match the target state when the scene is checked. | Boolean | no, defaults to true
+
+See [JSDoc: getSceneEngine()](https://florian-h05.github.io/openhab-js-tools/rulesx.html#.getSceneEngine) for documentation of parameters.
 
 ### Scene rule
 ```javascript
-rulesx.getSceneEngine(scenes, engineId);
+rulesx.getSceneEngine(sceneDefinition);
 ```
-Parameter | Purpose | required
--|-|-
-scenes | The scene definition array of objects. | yes
-engineId | The id of the scene engine, used in description. | yes
+| Parameter       | Purpose                                | Required |
+|-----------------|----------------------------------------|----------|
+| sceneDefinition | The scene definition array of objects. | yes      |
 
 ***
 ## Alarm Clock

src/rules/sceneEngine.js

@@ -178,7 +178,7 @@ class SceneEngine {
  * @param {String} sceneDefinition.scenes[].targets[].item name of Item
  * @param {String} sceneDefinition.scenes[].targets[].value target state of Item
  * @param {Boolean} [sceneDefinition.scenes[].targets[].required=true] whether the Item's state must match the target state when the engine gets the current scene on change of a member
- * @param {Function} [sceneDefinition.scenes[].targets[].conditionFn] the Item is only commanded if the evaluation of this function returns true
+ * @param {Function} [sceneDefinition.scenes[].targets[].conditionFn] the Item is only commanded and required for scene checks if the evaluation of this function returns true
  * @returns {HostRule} SceneEngine rule
  */
 const getSceneEngine = (sceneDefinition) => {