CDS-518 Added subject mappings for NPJSBA

Also removed deprecated products.xml file
CDS-524 Added new journal NPJBCANCER

Added pcode to list of Maestro AJs
Added journal information to look-up file
CDS-524 Added allowed article types for NPJBCANCER
CDS-530 Added new journal NPJPARKD
CDS-530 Added allowed article types for npjparkd
CDS-479 Amended rules to allow "bookshelf" to be used as sec-type attribute value

To support book reviews in Nature Plants
CDS-527 Added mtnacode-11 to allowed AJ subject codes
Merge pull request #24 from nature/CDS-518

Cds 518