README: add last known working Blender version

portability: don't use removeprefix/removesuffix

import: use .dump filename for object/mesh

import: refactor & tweak

README: rephrase & simplify

README: remove note about firmware

README: update note about exporting

Optimize: faster image decoding

Optimize: precompute flat VRAM arrays

Add link to precompiled melonDS EXE

a few README corrections; suggest Cycles for translucency

import: fix bug in format 5 textures

implement toon/highlight blend mode

import: stringify custom properties; fixes "too large int" error

import: bugfix: skip over contents of shadow poly packets