[Shotwell] Shotwell autotools conversion

[Jens Georg <mail jensge org>]

Hello,

I have pushed the current state of the autotools conversion to
wip/autotools branch[1]

I would appreciate any testing, especially on non-ubuntu systems.

Also, is anyone using the apport integration?

Thanks.

[1] https://git.gnome.org/browse/shotwell/log/?h=wip/autotools