Added test case bugs/modalg_5/bug24204
Modified following test cases:
bugs modalg_3 bug605 - case with bad input data, command "settolerance w1 1.e-7" was added;
bugs modalg_4 bug629 - wrong case, now the algorithm can not build pipes on such profiles, test case was removed;
bugs modalg_4 bug13595_1, bug13595_1 - number of subshapes was has changed;
bugs modalg_5 bug23706_2 - square of resulting face was changed;
bugs modalg_5 bug23870_1, bug23870_2, bug23870_3, bug23870_4, bug23870_5 - the number of subshapes was changed.
1. Approximation of derivative (by Taylor-series and by three points).
2. Some methods (Degree(), GetType(), D0(), D3(), DN()) are added.
3. Getting of subInterval's boundaries.
4. Algorithm for checking if 1st derivative is equal to zero is amended.
5. Cases are controlled when extrema or Project point do not exist.
6. GetNormal() function for gp_Vec2d was added.
7. Computing of Value, D0, D1, D2 and D3 for offset curves was changed.
8. Limitation of tolerance for derivative computing was added.
9. Methods for computing trihedron in singularity point are added.
10. Test tests/bugs/moddata_3/bug23706 is added.
11. Restriction on the LastParameter for visualization of 3-D curves. Calling PlotCurve(...) function for last interval.
12. LProp package is modified for tangent computing in singularity point (LProp_CLProps, LProp_SLProps).
13. Added test cases for issue.
Deleting bad test cases for this fix
