BibConvert: Added XSLT script and XML files for Inspire2CDS conversion

* Includes the XSLT stylesheet for conversion of MARCXML from the Inspire
  format to CDS. They were originally available here:
  https://twiki.cern.ch/twiki/bin/viewauth/Inspire/SystemOperationsCDSIngestion
  They've been included here for version control reasons.
  inspire2cds.xsl included with dependencies (XML files)

* New files included in Make file, installs to bibconvert/config folder

* XSL file preserves DOI, hyphens removes from CDS labels in experiments
  XML file, author name initials converted to spaces instead of being removed.