Update README.md

Author: php-evs

README.md

@@ -1,9 +1,28 @@
 # bitrix-learning-orm
 ORM for bitrix learning module.
 
+## Requirements
+
+* PHP >= 7.1.0
+* Bitrix CMS >= 18.0
+
 namespace \ES\Learning
 
-# Examples
+## Installation with composer
+
+in composer.json add:
+
+"php-evs/bitrix-learning-orm": "dev-master"
+in "require" section
+
+and
+{
+  "type": "git",
+  "url": "https://github.com/php-evs/bitrix-learning-orm"
+}
+in "repositories" section
+
+# Use Examples
 
 ## 1 Get all Lessons from specific Site sorted by Course active date, Lesson active date
 ```php