docs : README file updated

Author: sepandhaghighi

README.md

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+<div align="center">
+<img src="otherfile/logo.png" width=250px height=250px>
+<br/>
+<a href="https://www.python.org/"><img src="https://img.shields.io/badge/built%20with-Python3-green.svg" alt="built with Python3" /></a>
+</div>
+	
+----------
+
+## Overview			
+OPEM is a open source PEM cell simulation tool
+
+## Installation		
+
+### Source Code
+- Download [Version 0.1](https://github.com/ecsim/opem/archive/v0.1.zip) or [Latest Source ](https://github.com/ecsim/opem/archive/master.zip)
+- Run `pip install -r requirements.txt` or `pip3 install -r requirements.txt` (Need root access)
+- Run `python3 setup.py install` or `python setup.py install` (Need root access)				
+
+### PyPI
+
+
+- Check [Python Packaging User Guide](https://packaging.python.org/installing/)     
+- Run `pip install opem` or `pip3 install opem` (Need root access)
+
+## Usage
+
+### CLI
+- Open `CMD` (Windows) or `Terminal` (UNIX)
+- Run `python -m opem` or `python3 -m opem`
+- Enter PEM cell parameters
+	-  T :  Cell Operation Temperature [K]
+	-  PH2 : Partial Pressure [atm]
+	-  PO2 : Partial Pressure [atm]
+	-  i : Cell load current [A]
+	-  A : active area [cm2]
+	-  l : Membrane Thickness [cm]
+	-  lambda : is an adjustable parameter with a possible maximum value of 23
+	-  N : Number Of Single Cells
+- Find Your Result In `Simulation-Result.opem` file (Open with Notepad)		
+
+		
+
+## Issues & Bug Reports			
+
+Just fill an issue and describe it. We'll check it ASAP!							
+or send an email to [[email protected]](mailto:[email protected] "[email protected]"). 
+
+
+## Contribution			
+
+You can fork the repository, improve or fix some part of it and then send the pull requests back if you want to see them here. I really appreciate that. ❤️			
+
+Remember to write a few tests for your code before sending pull requests. 
+
+
+
+## License
+
+<a href="https://github.com/ecsim/opem/blob/master/LICENSE"><img src="https://img.shields.io/github/license/mashape/apistatus.svg"/></a>
+
+
+## Donate to our project
+								
+<h3>Bitcoin :</h3>					
+
+```12Xm1qL4MXYWiY9sRMoa3VpfTfw6su3vNq```			
+
+
+
+<h3>Payping (For Iranian citizens) :</h3>
+
+<a href="http://www.payping.net/sepandhaghighi" target="__blank"><img src="http://www.qpage.ir/images/payping.png" height=100px width=100px></a>