Merge branch 'samWang' into sean
fix a small bug
To fix some rubocup problem.
Add an exception catch in the main code, output the message when the user have an invalid input.
Update the gem version to 0.1.3 and push it on the Internet.
Edit some description in README file.
Merge branch 'master' of github.com:seanyen0507/web_scraper
Merge branch 'sean'