Copy fix for project donation.

BB-308 #close
Use Netherlands as the default country for anonymous orders.

BB-297 #resolve
Use correct link to project in voucher redeem email.
Don't set project twice when redeeming voucher.
Remove unused variable 'currentVoucher' in ProjectRoute.
Small code formatting and style fixes.
Merge pull request #317 from benkonrath/voucher-redeem-fixes

Voucher redeem fixes
Merge pull request #316 from benkonrath/nl-default-anonymous-order

Use Netherlands as the default country for anonymous orders.
Add supporters to project