Ox 10.0: new features and fixes

New features and enhancements in version 10.0
Fixed problems in version 10.0

New features and enhancements in version 10.0

Changed default path: user part after system (and without include and apps).
insertc(<>, 0, 1) and insertr(<>, 0, 1) now return <0>.
macOS dynamic library is now .dyld instead of .so, and linked with dynamic instead of bundle. All DLLs need to be recompiled for Ox 10.
!string and !array now work as expected
Added strings().
Keyed indexation can now use member-style notation, provided the key is an identifier. So arr["aa"] equals arr.aa.
Updated libcurl, renamed oxcurl.oxh (the header for the dll wrapper) to oxlibcurl.oxh (to contrast more clearly with oxurl.oxh).
graphics
- areas are now boxed by default
- DrawQQ now allows for error bands Also thinning QQ plot to 1024 points (thinning is done along X axis)
- histograms are now a `vector' instead of a separate section
- Added arrows
- dropped Postscript support
DrawAdjust(ADJ_AREA_,...) use -1 for last area.
OpenDrawWindow(GWG_file) to open a GWG file; OpenDrawWindow("") to reopen a graph for further additions after ShowDrawWindow.
"%J" print/scan format for JSON.
Ox export adjustments: FOxGetDataMember returns array with member names if name argument is "" or NULL. New functions: OxValGetDbl, OxValGetI32, OxValGetMatVal, OxValSetMatVal.
nullish operator ?? .NaN and .Null are nullish, but FALSE is not, so
```
decl x = arr.key ?? -1;
```
sets x to -1 if arr.key is .Null or .NaN, or to arr.key otherwise. This is different from
```
decl x = arr.key || -1;
```
because x would be set to -1 whenever arr.key evaluates to false.
isnull can also check reference:
```
    decl a; 
```
then isnull(&a) returns TRUE, whereas isnull(a) is a runtime error.
The spline function can have 4th argument "kernel".
strings: added array of formats (this does not vectorize a column or row vector)
submat: negative r2,c2 are increased by row/column size.
fsplit: split filename in components
cumsum skips over leading missing values
insertc, insertr with indices

Fixed problems in version 10.0:

Reading array from oxo file (oxobj.c): now using OxValSetArray, so that allocated size is set correctly, rather than undefined.

This file last changed .