Fix yaml

Update changelog.

Make newlines act as whitespace also in the cmdline client.

Add missing AppImage logo icon.

Enable setting PYTHON_SITE_PATH by hand when calling cmake (mainly fo…

…r homebrew).

Merge branch 'bugs/meld-spurious-zero'

Fix bug that would incorrectly assume a spinor line in things of the …

…form \psi_a ... \bar{\psi_b}.

Bump patch version.

Update pybind.

Merge pull request #268 from kpeeters/fix-substitute-scalar-crash

Add missing canonicalisation of rationals when simplifying powers