Client side: Small correction

Small correction
Server side: Class to generate random code

Class to generate random code
Client side: Added library to generate pdf

Added library to generate pdf. https://github.com/MrRio/jsPDF
Server side: Added framework to process codes

Added framework to process codes
Server side: Added framework to process directories

Added framework to process directories
Client side: Added JS to generate paper code

Added JavaScript to generate paper code
Admin side: Basic setup, folder listing and code generation

Basic setup, folder listing and code generation