* It's required for replay applications to call InitialiseReplay() before doing
any work, and to call ShutdownReplay() once they're finished.
* This lets us do more heavyweight shutdown work before global destructors are
being invoked and the RenderDoc instance is being destroyed.
* Anything that needs to be shut down during capture still has to happen in
RenderDoc::~RenderDoc since we obviously can't get the application to call a
shutdown function in that situation.
* Descriptions for readers, for better error reporting and usage help.
This also allows these descriptions to be multiline, and they're
indented correctly.
* A bit better formatting of options and defaults.
* Print full list of errors when there are more than one.
* #undef max
* Header as well as footer on single-line command help.
* Remove parse and parse_check variants I don't use.
* Allow processing without looking at argv[0].
* Optionally stop the processing at the first non-command, so that
you can have a program and its arguments without trying to parse
the arguments themselves.
baldurk