New packages: SuiteSparse-5.10.1, igraph-0.9.4, rankwidth-0.9

[tornaria]

Dependency for sage. I compiled sage-9.4 using this (maybe I should add: it is the sage I use every day).

I placed these three packages in one PR because of their dependency.

[leahneukirchen]

/usr/bin/rw clashes with the rw packages, is it possible to rename this? else add conflicts=.

[leahneukirchen]

Else drop the binary and the /usr/share/doc/rw, we probably won't need it.

[tornaria]

Else drop the binary and the /usr/share/doc/rw, we probably won't need it.

It turns out sagemath doesn't need the binary, so I just removed the binary and docs.

In case anyone ever needs the binary, we can rename the binary or make a separate package with conflicts= or whatever...

[tornaria]

Second force-push because I had forgotten to git add.