chore, PEBKAC, use version strings from version.mk in info/ subdir too

This changeset is to make man pages display the correct version at the bottom.

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
bump, release v0.2.5 is imminent

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>