Revert all prettyfied XML parsing because of the negative performance impact
Tests suggested a slight performance boost using [x] over (vector x)
Fixed wrong indenting in convert-to-utilmd-xml
Fixed test flow to use correct convertion function

    Regression introduced when replacing enlive with data.xml
Added (almost) full utilmd e07 message convertion

   Excluding UNA, UNB, UNT and UNZ
Added README on how to test convertion both ways EDI -> XML -> EDI