leave system cron alone

Taking JoshKastang’s idea from #153, the system cron file will be left
alone and the pihole.cron gets its own.

advanced/pihole.cron

@@ -1,22 +1,11 @@
-# /etc/crontab: system-wide crontab
-# Unlike any other crontab you don't have to run the `crontab'
-# command to install the new version when you edit this file
-# and files in /etc/cron.d. These files also have username fields,
-# that none of the other crontabs do.
-
-SHELL=/bin/sh
-PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
-
-# m h dom mon dow user  command
-17 *    * * *   root    cd / && run-parts --report /etc/cron.hourly
-25 6    * * *   root    test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.daily )
-47 6    * * 7   root    test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.weekly )
-52 6    1 * *   root    test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.monthly )
-
 # Pi-hole: Update the ad sources once a week on Sunday at 01:59
 #          Download any updates from the ad lists
 59 1    * * 7   root    /usr/local/bin/gravity.sh
 
+# Pi-hole: Update the Web interface shortly after gravity runs
+#          This should also update the version number if it is changed in the dashboard repo
+30 2    * * 7   root    /usr/local/bin/updateDashboard.sh
+
 # Pi-hole: Parse the log file before it is flushed and save the stats to a database
 #          This will be used for a historical view of your Pi-hole's performance
 #50 23  * * *   root    /usr/local/bin/dailyLog.sh

automated install/basic-install.sh

@@ -260,8 +260,7 @@ $SUDO curl -o /var/www/html/pihole/index.html https://raw.githubusercontent.com/
 }
 
 installCron(){
-$SUDO mv /etc/crontab /etc/crontab.orig
-$SUDO curl -o /etc/crontab https://raw.githubusercontent.com/jacobsalmela/pi-hole/master/advanced/pihole.cron
+$SUDO curl -o /etc/cron.d/pihole https://raw.githubusercontent.com/jacobsalmela/pi-hole/master/advanced/pihole.cron
 }
 
 installPihole()