added test data for Pape (dev and test)
* added constant for abbreviation tag to be used at import
Merge branch 'xmlimport' of https://github.com/neradis/index-vivus into xmlimport
added abbreviation support for PapeImporter
* special cases included (line breaks in abbreviation meanings etc.)
improved line break detection for abbreviations with meanings with more than one <p>
* false positive detection for content errors (missing dot at the end of a line)
improved info output
* removed debug statements
* fixed minor bugs in abbr-detection
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