i'm proud to introduce common icons for all languages for default theme.

i'm proud to introduce common icons for all languages for default theme.
those icons directly comes from a kde icon set (no change of name).
they are supposed to be self explanatory and can be use to avoid "delete...", "add..." links
the admin pages have been modified and will be commited immediatly.
the look of koha is really nicer with those little icons.

Note that if you want to change the icon set, you just need to pick the icons in your kde local icon folder :-)