Reading additional information in order response files

[rainer-helbing]

Hi Stephan,

while reading / writing an order-response file from a supplier with your library I noticed some errors e.g.

• PRODUCT_FEATURES are missing description (there is an error in the reader)
• ALLOW_OR_CHARGES_FIX which is part of PRODUCT_PRICE_FIX is missing

Is it ok, if I fix the errors I find and send you the pull requests? I don't want to open an issue for each of them.

regards
Rainer

[stephanstapel]

II have renameed this issue. Please feel free to go ahead and link your PR to this issue.