update documents

readme.md

@@ -78,8 +78,54 @@ e.task('.search-list-item', ['a@href'], ["http://sample.com/abc"])
     .start();
 ```
 
+### Extractor Options
+
+Specify extra options, to make task do some actions before scrape the data.
+
+```js
+var job = new Extractor({ "scrollToBottom": 1 });
+```
+
+Available options:
+
+- `scrollToBottom`: Try scroll pages to the bottom, some elements are loaded only we user need them.
+
+
+### Export Result of Any Task
+
+To a multiple task Extractor `e`:
+
+```js
+e = new Extractor()
+e.task('.search-list-item', ['a@href'], ["http://sample.com/abc"])
+    .task('list-item', ["a.title", "p.content"])
+    .start();
+```
+
+User will be asked to export the final result when it finishes.
+
+Incase you want to export it again, use:
+
+```js
+e.export()
+```
+
+To export another task result, other than the final one:
+
+```js
+// export the result of first task
+// to the example above, that is a list of urls
+e.export(0)
+// export the result of second task
+e.export(1)
+```
+
+## Task Management
+
 ### Continue Tasks
 
+Sometimes, it's hard to finish them in an single execution, that why we need "Continuing of Tasks".
+
 You can always continue tasks (with following), even it stops in the middle of a task:
 
 ```js
@@ -99,9 +145,11 @@ e.restart(0)
 e.restart(1)
 ```
 
-### Save Result of Any Task
+### Save & Load State
 
-To a multiple task Extractor `e`:
+It may also be hard to finish tasks in even a single day, we need a way to save current state, and come back tommorow.
+
+Create and run an extractor:
 
 ```js
 e = new Extractor()
@@ -110,20 +158,16 @@ e.task('.search-list-item', ['a@href'], ["http://sample.com/abc"])
     .start();
 ```
 
-User will be asked to save  the final result when it finishes.
-
-Incase you want to save it again, use:
+Save the state:
 
 ```js
-e.save()
+e.save();
 ```
 
-To save another task result, other than the final one:
+Load the state:
+
+Open the popup window, upload the saved state file. Then, and in the backgoud console:
 
 ```js
-// save the result of first task
-// to the example above, that is a list of urls
-e.save(0)
-// save the result of second task
-e.save(1)
-```
+e = new Extractor().load();
+```