Add install deps needed to run the gae dashboard.

Auditors: chris

Test Plan:
Ran these manually on toby and then did
   sh -c 'echo "--- `date`"; $HOME/internal-webserver/gae_dashboard/fetch_stats.sh -n >> $HOME/logs/gae_dashboard_stats.log' || echo "gae_dashboard_stats run failed; see $HOME/logs/gae_dashboard_stats.log"
on toby:$HOME and it completed without error.