Fix website link from "getting started" to "download".
Update the cache counters when accessed.
Merge pull request #78 from DavidCPhillips/cache-age

Update the cache counters when accessed.
Fix closure compiler bug with cache trim method.
Merge pull request #83 from DavidCPhillips/master

Fix syntax bug with cache trim method.
Merge pull request #79 from nicksay/web-links

Fix website link from "getting started" to "download".