The only None ranks now are:
- cdgdec/cdgparse: Primary
- rav1enc: Primary
- reqwesthttpsrc: Marginal
- s3sink/s3src: Primary
- mccenc/mccparse: Primary
- sccenc/sccparse: Primary
All other ranks are set to None until the elements are ready to replace
the existing C elements, or are otherwise production-ready and of a
element kind that should be autoplugged in one way or another.
For example the sodium elements are production-ready but can't be
autoplugged and as such should stay at a None rank.
If the current timecode can't be parsed, the plugin falls back
to last knonw timecode to at least have something. The code
that does this already existed but the last_timecode was just
never set.
* The Debug category was moved to a lazy_static!.
This allowed for a couple of methods, to be implemented
directly against the State struct since the debug category
was their only dependency from MccParse.
* Log the Caps/Format change
The ones for gstreamer and glib are left there to avoid importing
the macros from weird paths, since the bindings are not yet ready
for this modules system
