Merge pull request #14 from Focus-Flow/bug/dont-cache-error-pages

Don't cache ErrorPages
API Extend ErrorPage detection to work on subclasses of ErrorPage
BUG Fixed issue with cache clearing not respecting flush protection
API DynamicCache now depends on cms module
Fixes #12
Merge pull request #13 from Focus-Flow/bug/cache-flushing-when-live

Add session starting logic to checkCacheCommands.
BUG Fixed issue with SecurityToken
Re-enabled security token and substituted the token into all cached results
Merge remote-tracking branch 'upstream/master'