Update README.md

Updated the installation and run instructions

Author: CuriousLearner

README.md

@@ -1,2 +1,32 @@
 # GeeksForGeeksScrapper
-Scrapes g4g and creates PDF
+Scrapes [GeeksForGeeks](http://www.geeksforgeeks.org) and creates html & PDF for chosen category along with syntax highlighting for the code.
+
+## Installation
+To use the scrapper, install the following:
+
+`$ sudo apt-get install wkhtmltopdf`
+
+Then create venv
+
+`$ virtualenv /path/to/g4g-env`
+
+Switch to venv
+
+`$ source /path/to/g4g-env/bin/activate`
+
+Now install BeautifulSoup as:
+
+`$ pip install beautifulsoup4`
+
+or via package manager as:
+
+`$ sudo apt-get install python-bs4`
+
+## Run the G4G_Scrapper
+
+$ python g4g.py
+
+Choose the category you want to scrape from the menu and wait for the magic to happen :)
+
+You can find the output as `G4G_<category_name>.html` and `G4G_<category_name>.pdf` in the same directory.
+