fixed #215 and #204
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Huge speed changes in this, finally utilizing the cache layer. Make sure core/cache is writable, but you should be able to see stuff being cached in there. Also, if you have an htaccess, make sure no one can get into the /core folder. Cache stays for varying lengths, but should be refreshing properly. At least 20% increases - stats have a nominal 3 minute cache on them, other things have maybe an hour to 24 hours. If there's changes, the cache is updated. On every page the cache eliminates at least 4 db calls.
Another is a maintenance script, which isn't completed yet, but if you have access to cron, you can set USE_CRON to true, and then set that script (admin/maintenance.php) to run nightly. Also alleviates 4/5 db calls for the "fake cron" which runs. Combined with above, it's about 10 calls which are gone. Yay for speed