Payson (Flexible Currency Choice)

This module is modified from the official Payson module to be more flexible.

I found several limitations in the official module and wanted to make some changes to make it
more flexible to my needs.

Following changes where made:

• Official Payson: Forces you to use the default currency for receiving payment
• Modified Payson: Chose between EUR and SEK currency (Example: you have 
default currency EUR, USD, DKK but can chose to receive payments in SEK)

• Official Payson: Module doesn't show up in other currencies than EUR or SEK
• Modified Payson: Module shows up no matter what currency you are using.

• If you are checking out with USD and are going to make a payment it will convert to
the currency you have chosen (EUR or SEK) when paying


I decided to add it here in case anyone else is interested, i wont be able to provide any support.

Enjoy :)