modify readme.txt

readme.txt

@@ -3,11 +3,20 @@ Contributors: igor-v-belousov
 Tags: batch, dev, development, prod, production
 Requires at least: 3.5
 Tested up to: 4.2
+Stable tag: 0.1.0
+License: GPLv2 or later
+License URI: https://www.gnu.org/licenses/gpl-2.0.html
 
 My version Drupal Batch API for WordPress.
 
 == Description ==
 
+Batch API need for running long-term operation without using the function
+`set_time_limit` or CLI.
+
+Long-term operation is divided into short-term sub-operations which are executed
+in the order queue. Sub-operation can send a message below the progress bar.
+
 Example code:
 
     $batch['title']='Title';
@@ -20,3 +29,10 @@ Example code:
       $context['message'] = 'Yeap! Work!';
     }
 
+== Installation ==
+
+1. Upload latest stable version of code <https://github.com/IgorVBelousov/batch_operations/archive/master.zip>.
+2. Unpack this archive to the `/wp-content/plugins/` directory
+3. Activate the plugin through the 'Plugins' menu in WordPress
+4. Use batch operations in your code.
+