Handle duplicate notifications

Issue #38 If Sage Pay does not receive the original notification, then it will send another identical one. If we get a duplicate notification (which means that the status is the same as the first time) then just return an OK without updating anything in storage.

Added optional fields to direct registration

0.9.6

Some optional fields missing from direct-registration

Amount validation

Validate the amount is in an acceptable format, if passed in as a string.

Also some additional details on README, PSR-4 support, and link back to github contributors.

Support XML Basket Discounts

0.9.4

Issue #27 Support XML basket discounts (fix to XML order).

Including Travis

Incorporated travis CI.

Packagist (2)

Remove version tag from composer.json as it conflicts with github release tag.

Packagist

Trying to get versions to sync with packagist correctly.

Some minor tidy-up but no functional changes.

More secure vendorTxCode and CURL options support

The default vendorTxCode now uses a longer and less predictable random component. The vendorTxCode is now 40 ASCII characters long. You can still supply your own vendorTxCode as has always been the case - this is just the fall-back for when you don't.

It is now possible to supply additional arguments to the CURL service, which is needed in some hosting situations.

Format amounts according to currency

All models that output monetary amounts have a setCurrency() method, with currency defaulting to GBP.

Monetary amounts are formatted according to the currency that is set. e.g. 27.30 for GPB, 27 for JPY, and 27.300 for KWD. Not all currencies are supported by SagePay, and not all currencies are necessarily enabled for an account, but all ISO 4217 currencies are supported by the library metadata.

Added WordPress PDO storage model

v0.8.1

Merge branch 'master' of github.com:academe/SagePay