With the upcoming `#include` cleanup, it finally makes sense to split
off all graphics-related code into its own header. In turn, it makes
more sense to store all of these future master.lib headers in, well,
the master.lib directory, which provides a new 8 characters for their
file names. Turns out that the rationale I gave for the root directory
placement in 8266bbd didn't hold up 3½ years later…
(Also, the `pc98.h` declarations will eventually be split into
`game/coords.hpp` and something in `platform/x86real/pc98/`.)
Part of P0284, funded by [Anonymous] and Blue Bolt.
Turns out that all of the previous inconsistencies in the Makefile are
covered by just 8 additional `#pragma`s in the code. Most of those
applied to code that already needed way more flags than the Makefile
bothered to address, such as the extremely silly `-O-`.
Part of P0002, funded by GhostPhanom.
The string literal placement issue mentioned in 942373e doesn't seem to
be an actual problem (anymore). This is also much simpler, as we get to
save tons of `extern` declarations at the cost of one additional
`#pragma option`.
Part of P0002, funded by GhostPhanom.
I might change this convention again in the future, particularly once
someone wants to fund C89 conformance, but let's stay consistent for
now.
Part of P0264, funded by [Anonymous] and Blue Bolt.
nmlgc