Changes:
  * Added a -H, --nightmode flag to fbdepth to toggle basic nightmode on mxcfb @ 8bpp
  * Support einkfb rotation handling in fbdepth (as well as during the init-time log messages)
  * Made fbdepth behave on Kindle
  * Update to Scientifica v2.0
  * Experimented with Unifont in the fixed-cell codepath, it's now optionally available.
  * Initial import of a new bitmap font in the fixed-cell rendering codepath, Cozette
  * Fix an issue will full-screen fbink_cls calls on rotated 16bpp fbs
  * Minor buildsystem, code & documentaton tweaks.

CLI Changes:
  * N/A

API Changes:
  * Added UNIFONT, UNIFONTDW & COZETTE constants to the FONT_INDEX_E enum.
  * Added OK_LAYOUT_CHANGE consant, for fbink_reinit
  * Revamped the new positive return values for fbink_reinit introduced in v1.22.0:
    it's now actually a bitmask, so all flags are set individually.
    OK_LAYOUT_CHANGE is new, and set when the layout of the fb changes (i.e., Portrait <-> Landscape).

ABI Changes:
  * N/A