update to calligra-2.7.5

build correct. many things are working as might be desired

calligraactive (works)
calligraauthor (works)
calligraconverter (works)
calligraflow (works)
calligraplan (works)
calligraplanwork (works)
calligrasheets (works)
calligrastage (works)
calligrawords (works)
calligra (runtime error, see TODO)
update to dcmtk-3.6.0; need by calligra