add slicebase to package repo
remove rsyncd.conf.in
add /opt/slice dir
carry over slicebase requirements
exit from %pre if rpm install is an update
rename generic-slice.m4.spec to get back syntax highlighting.
update docs and checks
add user/group creation on install (if missing)
Merge pull request #1 from stephen-soltesz/master

Add slicebase files to package repo.