Updated composer to support symfony 2.2.*
Merge pull request #14 from zachbadgett/develop

Updated composer to support symfony 2.2.*
Merge branch 'develop' into master
Added branch alias to composer.json
Merge pull request #16 from zachbadgett/composer-update

Composer update
Merge branch 'develop' into master
Updated guzzle version in composer.json
Merge branch 'develop' into master
Merge pull request #18 from zachbadgett/composer-update-fix

Updated guzzle version in composer.json
Added CONTRIBUTING
Updated contributing documentation
Formatting fixes in CONTRIBUTING.md
Merge pull request #19 from tyler-sommer/develop

Added CONTRIBUTING
Merge branch 'develop'
Merge branch 'master' into feature/mercurypay