minor improvement of data table dialog
do not use cache for linear problems
rid of qwt
added qcustomchart
rid of qwt
set linearizer curvature
pygeometry - conversion py objects to c++
pygeometry - small changes, fixes and documentation
script documentation
small change in pygeometry
unittest for pygeometry (basic concept)
basic geometry transformation benchmark
std::string in pypropblem class
pyproblem basic test (not finished)
std::string in pygeometry class
pyfield revised (phase 1)
pyfield revised (phase 2)
progress on pyfield
adaptivity_info revised
progress on pyfield class