* Added a directory argument for notify_{stat/attribute}_changed().
* This allows to watch only a directory, and get the notifications for
all of its files, not just add/remove entry notifications.
can use this structure to call fstat() on attributes and indices.
Added more functions to the file system interface (attributes, and indices).
Added header fs_attr.h, and fs_index.h.
git-svn-id: file:///srv/svn/repos/haiku/trunk/current@1158 a95241bf-73f2-0310-859d-f6bbb57e9c96
