switch from git-annex to simple manually-managed symlinks

switch from git-annex to simple manually-managed symlinks

as awesome as git-annex is, i think it's a bit of an overkill for my
use-case here for my site.  here, simple symlinks to outside the repo
for those files will work just fine.  especially since i don't need to
version-control those files.  at least not for now.