Auto Expires cache items when a Quota error is thrown
Merge branch 'grunt-0.4' into auto-expire
Recursively tries to free cache when full
Adds a spec for testing QUOTA_EXCEEDED_ERR handling
Adds documentation for the priorityFn option.
Clarifies how the default priorityFn works and how to override it.
Merge pull request #15 from inf0rmer/auto-expire

Automatically expire cached items that are considered stale.