added invoiceNumber, custom and softDescriptor to Transaction
Merge pull request #34 from nhammond101/transaction-updates

added invoiceNumber, custom and softDescriptor to Transaction
Modified field percentage to be instance of Float instead of primitive type float. Remote PayPal API server was not allowing line discounts when an Amount discount was being applied to invoices due to Gson forcing the definition of Percentage due to primitive type.
Merge pull request #36 from rrolfeRKPE/master

Modified Cost.Percentage field type to Float
Merge branch 'stable'
Merge branch 'master' of github.com:paypal/rest-api-sdk-java
Correct future payment javadoc
Merge branch 'fp-javadoc-update' into stable