added license
Added myself as copyright holder
added a FocalBSplineCurve
implemented knot insertion on focal BSpline Curves
added new sphere class
added getters to sphere
added new ray class
Fixed 2 small bugs in InvoluteGear
Merge branch 'master' of https://github.com/happah-graphics/happah
fixed a compiling error of a "not allowed forward declaration of
<<QMenuBar>>" in MainWindow.cpp.
Solved via: Simple adding the include "#include <QMenuBar>"
Merge branch 'master' of https://github.com/happah-graphics/happah into ball-pivoting-SS13-group5