1.4.10 - Fix raylib mockup, bump savefile version

[jgabaut]

Changed

• The raylib build gets to see more of the lower APIs thanks to new notifications interface
• Drop s4c-gui inclusion for raylib build
• Trim gameloop_rl(), use hlpd_getopts() and hlpd_reset_logfile()
• Use texture rendering to scale the whole texture
• Changed some error messages for save loading

Fixed

• Add release_data.o to make clean
  • Closes #99
• Refactor hlpd_default_keybinds and other places needed to build with raylib
  • Closes #94

Notes

• Add sizeof(SerGamestate), sizeof(SerSaveHeader) to const.c, const_rl.c anvil tests
• Use int64_t for start_time in SerGamestate, instead of platform-specific-width clock_t
  • Improves #80
• Use int32_t for a couple of SerChest values
• Bump HELAPORDO_BINSAVEFILE_VERSION to 0.0.5