CVS commit by antlarr: 

Klaus Niederkrueger <kniederk@mi.uni-koeln.de>
* reworked and cleaned up kcalc_core
* simplified API to KCalcDisplay


  M +3 -3      dlabel.cpp   1.13
  M +10 -16    kcalc.cpp   1.167
  M +0 -1      kcalc.h   1.87
  M +177 -201  kcalc_core.cpp   1.88
  M +60 -34    kcalc_core.h   1.7
  M +54 -58    kcalcdisplay.cpp   1.22
  M +8 -4      kcalcdisplay.h   1.12