Adding number of empty lines as config option, for invoices, transactions, orders.

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extra : source : ae93658d0b5e7f17ce111fb22b060ffc89e122bb
IR.pm handles extra lines correctly now

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extra : source : 33016239fd6bee9e1c01eb04ad4cf41cbb4a854e
final fixes for min_empoty setting

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extra : source : 49e58b72378f1b063130851c4cdba371a9c03a2d
Merge pull request #539 from einhverfr/master

Adding number of empty lines as config option, for invoices, transaction...