Add Contribution Guide

[ashokdey]

What do we need in the Contribution Guide?

• When adding a new problem with solution

  • Take care of the filename convention (Very Important)
  • Problem statement should be there with examples
  • Make sure you add the Run Time complexity of your solution
  • Please take care of the segregation of the Problems as per the given Folder Structure
  • It's great if you can add the Unit Tests to verify your solutions as well
  • Strictly follow ESLINT rules

• When adding a Unit Test

  • Take care of the file name convention
  • Make sure CI (Travis) is passing

[ashokdey]

This Guide closes this issue.