added boost GML reader
moved vtu interface to boost directory
changed sources based on PR comments
changed the gml-standard to require z-coordinates for points, changed qt-gml-interface to avoid problems based on PR comments to boost
made static method private non-static; changed include order
gml-reader will now abort when name-tag is empty; removed superfluous warnings in qt-reader (already covered by validator)
fixed indentation
updated data conversion methods in qt gml reader
Merge pull request #310 from rinkk/BoostGmlInterface

Boost GML Interface