Fixes sandbox url to use www.sandbox.paypal.com
Fixes broken test
Merge remote-tracking branch 'upstream/master' into fix_sandbox_url

Conflicts:
	dist/paypal-button-minicart.js
	dist/paypal-button-minicart.min.js
	dist/paypal-button.js
	dist/paypal-button.min.js
Merge pull request #43 from cbetta/fix_sandbox_url

Fixes sandbox url to use www.sandbox.paypal.com