Folks uses collection/set objects from libgee to store email addresses
associated with an individual. Unfortunately to extract addresses, parts
of libgee which are unusable from (introspected) bindings have to be
used[0], so add a helper method.
[0] in particular gee_iterator_get(), which is annotated as
"return: (transfer full): gpointer"
https://bugzilla.gnome.org/show_bug.cgi?id=660580
This adds contacts search to shell, powered by libfolks.
Changes:
- Add Folks and Gee to the build system
- ShellContactSystem, a backend in C
- ContactDisplay, search frontend in JS
https://bugzilla.gnome.org/show_bug.cgi?id=643018
