The idea is, since we have KatzeItem, KatzeList and KatzeArray
now, except for KatzeXbelItem's loading and saving XBEL the
interface is obsolete.
As a bonus, we actually save the trash again.
A lot of new properties are added, which are going to
be the basis of the coming configuration replacement.
Also a little cleanup is done in a few places.
Based on the implementation of localization via Gettext
contributed by Enrico Tröger, a few adjustments were made
to allow Midori to be properly localized. Initially
German is fully supported.
Initially new bookmarks can be added. The panel gains a small
toolbar to Add, Edit and Delete items.
Besides a serious bug in the XBEL implementation is fixed and
a number of error checks is added..
