0.9.7claws10

0.9.7claws10

* src/Makefile.am
* src/account.c
* src/folder.[ch]
* src/folderview.h
* src/imap.c
* src/localfolder.[ch]          ** NEW **
* src/mainwindow.c
* src/mh.[ch]
* src/news.[ch]
* src/prefs_account.[ch]
* src/prefs_filtering.h
* src/procmsg.h
* src/remotefolder.[ch]         ** NEW **
* src/common/xml.[ch]
        add item_set_xml() and item_get_xml() virtual functions to
        FolderClass to give folders the ability to add extra information
        to the saved FolderItem data. If NULL the default function for
        FolderItem will be used.