* Some functions can be so quick that they register as a duration of 0.
This is expected and we should not end up omitting it when importing
or exporting because we think it was missing. As a 64-bit value,
losing a bit for signedness is not a problem.
* Mostly used for passing a progress float back during a long blocking
call like opening a capture or doing a copy.
* This is much more feasible for python to bind to.
* In several cases we just use a tiny lambda that updates a float anyway
since we can't push the progress directly into a progress dialog, but
need to let it query from a temporary in-between float.
* When opening a capture file, a format is now available to allow
easy import from another format without a completely different
interface. Only rdc files can be replayed, but any other file can
load and access structured data through the same interface.
* The replay initialisation and capture writing interfaces also use the
RDCFile instead of passing filenames or Serialisers around directly.
Driver initialisation parameters are now entirely private, and don't
need to be exposed - any agnostic metadata like thumbnail, driver, etc
are all accessed via the RDCFile container itself.
* Callstack resolution is now part of the container file, not the
back-end via way of its Serialiser.
* Importers/Exporters to other non-RDC formats are registered in a
similar way to replay/remote drivers.
* It is also then possible to construct an RDC file from thin air, by
creating an empty RDCFile container and filling it with data, then
requesting it to be written to disk.
baldurk