OpenSystemsDevelopment / qpdf

Also, add const overload of QPDFObjectHandle::getObj

Add temporary clone of SparseOHArray  to implement non-sparse mode.

Refactor QdfFixer::processLines

Remove redundant parameter depth from QPDF::updateObjectMaps

Add new data member QPDFWriter::Members::root_og

Also, uninitialize QPDFWriter::Members members.

Also, change QPDFJob to use unique_ptr<QPDF> instead of shared pointers.

This reverts commit 56c923d1096b0317d978bdadeb44e8198053286c.

This commit breaks pikepdf.

Recognise that JSON objects are effectively shared pointers to JSON_value.

Refactor creation of object descriptions

Eliminate the use of shared pointers in JSONParser

Allow access to private header files when defining data members.

Use string_view parameters and call pipeline write methods directly.