Ox 3.10: new features and fixes

New features and enhancements

Updated Basic examples to Visual Basic 6. Updated ox/dev/OxWin.bas, and created ox/dev/OxGiveWin.bas for link to GiveWin.
checked Borland version of threes.c.
Updated OxPack documentation in Appendix
Updated exported function list in Appendix.
Put the Imhof code in ox/lib/probimhof.ox
Online help: added all the examples of the standard function library.
Added "%lwr" to print only lower diagonal. For example: print("%lwr", x);
added isdotmissing/ismissing (test for NaN or infinity).
Added ADJ_LEGEND for DrawAdjust.
Improved number of columns per line when using "%cf" print format.

Online help: GetDbName/SetDbName should be in Modelbase
Improved timer function under Linux.
Matrix multiplication is slow: some left-in debugging code resulted in the multiplication done twice (once slowly, once quickly, so slow overall!). This would be noticeable when working with large matrices.
Fixed problem with the contour plots in DrawXYZ.
SolveQP with bounds only didn't work; didn't always handle bounds correctly. (NB. this SolveQP is very slow on larger problems. A new version is under development.)
Docs: default for dMin argument of DrawHistogram is 1, not 0.
OxGauss: gradp returned result transposed.
Reading version 2.1 .xls files: integers beween 32000 and 64000 are read as negative numbers (not a problem for version 3 or more recent Excel files; note that Ox never saves an .xls file with integers).
Saving as in7 file: didn't check for spaces (could be problem, e.g., when loading from .xls, and then saving). The .in7 file with spaces in variable names would not load properly, suggesting a corrupted file. However, the data (.bn7 file) was intact, and the .in7 file (which is a text file), can be easily fixed.