Added simple test case for the XML importer
merging in fixes from master
added fixed input data for Pape
* first 1000 entries from source material
issue41 fixed
reworked abbreviation detection with Aho-Corasick
* made abbreviation tag customizable
Importer fix (abbreviation marks not set depending on filesystem characteristics))
* fixed platform dependant problem of non-existing abbreviation marks
* removed unused utility class
more informative failure messages for the marking of abbreviations by the importers
Merge branch 'master' into frontend