Merge pull request #3 from sofa/nick

feat(docheckoutst): switch to new API, check for redirects at pre- and p...
fix(redirect): don't throw, just return to prevent unwanted error messages on redirect
chore(*): release 0.4.1
fix(payone): don't pass undefined card numbers
chore(*): release 0.4.2
fix(payone): use v5 for every payone method, pass all payone parameters
feat(redirect): pass object with redirect parameter to detect redirects in the app
feat(checkout): specify whether a separate shipping address is allowed