1. Introduce X-Function nlbeginor for implicit fit with multiple variable function

2. Improve X-Function nlbegino to work with functions in all category

3. Fix X-Function nlbegino’s issue about skip Error data

nlbeginor example:

string fn$=system.path.program$ + "Samples\Matrix Conversion and Gridding\XYZ Regular.dat";

newbook;

impasc fname:=fn$;

nlbeginor irng:=(1,2,3) func:=PlaneMod;

nlfit;

nlend 1 1;