allow pdo options.
allow the optional fourth 'options' parameter to PDO constructor to be used
Merge pull request #396 from brettmc/feature/allow-pdo-options

allow pdo options.
Add dynamodb storage support
changelog for 1.4
DynamoDB storage : Add comment and fix coding standards issues
Dynamodb storage : Add aws sdk php to composer
DynamoDB storage : fix coding standards issues
Rename Dynamodb.php to DynamoDB.php
Improved Dynamodb API array parameter
Improuve comment header
scope test correction : order of default scope cannot be determined
add dynamodb test
Correct dynamodb test issues
check if \Aws\DynamoDb\DynamoDbClient is available
renamed error name for malformed/expired tokens
updated tests for malformed and expired tokens
Openid connect : bug Claims fusion with more than one scope (email profile)
Openid connect : bug Claims fusion with more than one scope (email profile)

#408
Merge pull request #399 from fauguste/develop

Add dynamodb storage support
better handling for missing dependencies when running tests