We used custom_load_conf() to load the configuration file and
io_save_conf() to save configuration. Move these functions, including
all helpers, to a central location.
Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>
Introduce a script to auto-generate version strings. Use `git describe`
to create descriptive version strings when building from a Git checkout,
use ".version" files for release tarballs.
Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>
