Add contributing and license in README.md
Add contributing and license in README.md

terry/linkedin-scraper,yatish27/linkedin-scraper,prabhpreet/linkedin-scraper,ronshoshani/linkedin-scraper,hilben/linkedin-scraper,hilben/linkedin-scraper,rowanhogan/linkedin-scraper,prabhpreet/linkedin-scraper,stepnivlk/linkedin-scraper