Issues with building IDSgrep under different configurations
Tested 0.6 release candidate under various Linux and MacOS configurations; seems to work in a default config with and without the rest of the Tsukurimashou Project, so we shouldn't have as many first-time users getting failed builds.
It's not clear that the existing IDSgrep distribution file really contains the right files to build IDSgrep in a standalone configuration when it's not a parasite build and there is no Tsukurimashou installation for it to refer to. In particular, it contains widthtab.c but not widthtab.h, which means it'll go looking for Icemap, which most users don't have; and it doesn't contain mitsuba.cls, which means it can't build the documentation. It can't build the documentation anyway without the Tsukurimashou fonts, but it should be quicker to disable documentation builds when they're likely to fail, and it should probably also include mitsuba.cls to make it more possible that they can succeed. One overriding principle is that users who try a build on the default settings and have it fail will think the package is bad even if they were (unknowingly) asking to build something optional for which they don't have prerequisites.