Merge branch 'sean'
merge from sean
add .travis.yml, Rakefile, Gemfile
Require directory bin/application.rb
Revise README.md file
solve the conflict file
Merge branch 'PoWei'
Removing require line, and it can execute.
Make Gemfile, NBA_info.gemspec, version.rb, LICENSE and build it to Rubygem.
Merge branch 'PoWei' of github.com:seanyen0507/web_scraper into PoWei

Conflicts:
	bin/application.rb
	spec/test.rb
Solve the problem due to the modify of website.
fix the gem require error
Change a line(rubocop).
Merge branch samWang & PoWei.
Merge branch 'samWang' into sean
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.