Use new rattail overnight command in cron-overnight.sh script

this is all a bit of WIP at the moment, perhaps..

rattail_fabric2/deploy/luigi/cron-overnight.sh.mako

@@ -6,21 +6,13 @@
 <%text>############################################################</%text>
 
 
-if [ "$1" = "--verbose" ]; then
-    VERBOSE='--verbose'
-    PROGRESS='--progress'
-else
-    VERBOSE=
-    PROGRESS=
-fi
-
 cd ${envroot}
 
-RATTAIL="bin/rattail --config=app/cron.conf $PROGRESS"
+RATTAIL="bin/rattail --config=app/cron.conf"
 
-$RATTAIL run-n-mail --no-versioning --skip-if-empty <%text>\</%text>
+$RATTAIL overnight ${automation.lower()} <%text>\</%text>
+        --no-versioning <%text>\</%text>
          % if email_key is not Undefined and email_key:
-         --key '${email_key}' <%text>\</%text>
+         --email-key '${email_key}' <%text>\</%text>
          % endif
-         --subject 'Overnight automation: ${automation}' <%text>\</%text>
-         ${envroot}/app/overnight-${automation.lower()}.sh
+        --no-email-if-empty