applied OS X fixes.
updated copyright year. configure.in: increased library version.
fixes wrong completion list on OS X.
fixed Bug #52: Address autocomplete: Not possible to select drop-down list element with arrow keys (Linux)
also use first and last name for address completion.
src/addr_compl.c: also match to the subsequent part of the name of contacts (Bug #51).
added new option: 'Set only mail address when composing from address book'.
src/addr_compl.c: removed debug print. made 3.1.0beta1.
made the old behavior of address completion configurable.
fixed infinite loop on completion start with GTK+ 2.18+.
implemented real automatic address completion.
don't open completion menu if entry equals to the completed address (warning fix).
't open completion menu if entry equals to the completed address.
fixed crash on csv import.
include gtk/gtk.h as a workaround for GTK+ >= 2.13.3.
fixed address completion.
fixed another format string bug in address completion.
insert address only if shift or control key is pressed when accepting completion.
improved address completion.
prevent warnings when ESC, BS etc. is pressed at address completion.
removed mbs/wcs functions which are no longer required.
fixed gcc-4.0 warnings.
replaced intl.h with glib/gi18n.h.
Initial import of Sylpheed (GTK2 version).