Added README.md file

Author: AnandD007

Binary-Calculator-GUI/README.md

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+<h1 align="center">Binary Calculator GUI</h1>
+A GUI based Standard Binary number calculator.
+
+---------------------------------------------------------------------
+
+## Modules Used
+- tkinter
+
+## How it works
+- It takes the input through a GUI binary number with mathematical signs.
+
+- Calculates the binary number.
+
+- It Returns the result in a binary number. 
+
+#### By [Avinash Kr. Ranjan](https://github.com/avinashkranjan)