Merge pull request #445 from benkonrath/order-payment-fixes

Order payment fixes
Use modelFor('currentOrder') to get voucher list.
Move DonationPreview to projects.js.
Small Ember model cleanups.
Remove donations from voucher orders and remove vouchers from donations.

BB-648
Catch exceptions from DocData when generating payment url.
Small cleanup of DonationSerializer.
Merge pull request #446 from benkonrath/order-voucher-payment-cleanup

Order voucher payment cleanup
Don't load payment profile when there are no order items.
Go back to payment profile on payment error.
CSS Changes
Project Detail Changes
Added flaticons, edited project detail
Rebase CSS
Project Detail Improvements
Fixed merge error Project Create
Merge pull request #450 from FransTwisk/front-end-design

Front end design
Remove unused console log.

BB-648
Add redirects for payment and payment profile.
Merge pull request #452 from benkonrath/payment-flow-fixes

Payment flow fixes