~/.rsync-filter: also sync ~/w

there has been some interesting stuff in it lately, all of it
unpublished and possibly unpublishable. (with maybe one or two
exceptions that should get published.)

also, should these things reside on a `secret` branch or should they
just not be version controlled. i think a `secret` branch would be
right, but then it could never be merged back without exposing
everything. mhh... how do people do this? (answer: they probably just
write it somewhere or separate the things. or maybe start out everything
in a secret place and then switch. in any case, they probably don't use
version control, or at least they don't worry about it and use a tool
that manages the process.)

.rsync-filter

@@ -1,5 +1,6 @@
# projects and other files
+ /d
+ /w
+ /k
+ /m