Update README.md

Author: familqasimov

README.md

@@ -1,3 +1,5 @@
+<p align="center"><img src="extras/graphics/512.png" alt="Byteconvert" height="200px"></p>
+
 # ByteConvert
 [![Build Status](https://travis-ci.org/SloCompTech/ByteConvert_cpp.svg?branch=master)](https://travis-ci.org/SloCompTech/ByteConvert_cpp)
 [![Packagist](https://img.shields.io/packagist/l/doctrine/orm.svg)]()    
@@ -79,4 +81,4 @@ uint8_t *block = ByteConvert::stringToArray(blk_size,somevar);
 // Use block 
 
 delete block; // Don't forget to free memory, when you don't need array any more
-```
+```