Install more dependencies
Install more dependencies

… and comment why they are needed. This enables building of the documentation
and translations.

Signed-off-by: Sebastian Ramacher <3b98333f54c4065fc5dde7d25d9ef0c46b63a01e@ramacher.at>

kdart/bpython,wevial/bpython,kdart/bpython,wevial/bpython,aktorion/bpython,aktorion/bpython