Usefull options

Hi, i would like to merge the following changes to your branch.
These are:
* support for x_company field (usefull for B2B transactions)
* support for Order information data [x_invoice_num / x_description] (usefull for conciliation)

If you think i did something wrong or unacceptable please let me know and i will be more than willing to fix it.

thanks.