Support parameters for the attachments
Add support of the online invoice/creditnote flag
Add support for SalesTaxPeriod and SalesTaxBasis
Add missing check on the parameter
Merge pull request #3 from rowley-xero/master

Support for new organisation values and the online file attachments
Adjust the test
Adjust the tests
Add more tests and support ACCREC
Merge pull request #4 from rowley-xero/master

Correct tests for IncludeOnline
Remove unneeded references
Use the Mono code to replace using System.Web
Adjust tests to use difference date format
Merge pull request #6 from rowley-xero/master

Remove System.Web
Add support for getting invoices and credit notes as PDF files
Increment the build number
Increment the build number
Update README
Merge branch 'master' of https://github.com/rowley-xero/Xero-Net
Revert changes
Merge pull request #8 from rowley-xero/master

Add support for getting PDF version of invoices and credit notes.