Use proper quotation marks and trim trailing whitespace in license.
Clean up whitespace and list numbers.
Use Markdown for license
Fix third level list item.
Fix wrapping.
Wrap to 80th column.
Use " and ' instead of curly quotes.
Updated requires
Update README.md
Added license
Update README.md
Update README.md
Update composer.json
Update composer.json
Update composer.json
Merge pull request #7 from bfrohs/licenseChanges

Update license file to match Github expectations
init _custom_fields to prevent undefined property error
Merge branch 'master' of https://github.com/AuthorizeNet/sdk-php
Add yml file for Travis CI