Installation.md

+1. Go to [site](https://github.com/nortikin/sverchok)    
+2. Download as on image:    
+ ![Download](https://user-images.githubusercontent.com/5783432/118532321-82d18280-b74f-11eb-8a04-f1205deda82d.jpg)    
+3. Open property window (Ctrl+Alt+U):    
+ ![Props](https://user-images.githubusercontent.com/5783432/118532329-849b4600-b74f-11eb-9751-5a12446cf6b2.jpg)    
+4. Select install from file and choose downloaded ZIP archive file:    
+ ![Install from file](https://user-images.githubusercontent.com/5783432/118532330-8533dc80-b74f-11eb-93bb-184f26d649b2.jpg)    
+5. And activate Sverchok with flag:    
+ ![Activate](https://user-images.githubusercontent.com/5783432/118532332-8533dc80-b74f-11eb-9b7a-99f9bffb6f9d.jpg)    
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