testing: specify utf8 encoding of expected xml file
testing: add #rspec_numbering_formatter as dev dependency
testing: specify utf8 encoding of expected xml file
xml: add GrpHdr/CtrlSum element
xml: add NbOfTxs and CtrlSum to PmtInf
xml: add PmtTpInf node under PmtInf
xml: make version explicit in spec
xml: lots of new behaviour for version 02 of spec
xml: don't build empty address tags
version: bump to 0.0.7