Fix for #451

Fix issue#467 id() method checks null instead of false

Modify media controller to use Imagy non-statically (Fix issue #477)

Fix Issue #451

 Adding translation support for Korean (ko)

which allows it being returned from a controller directly.

"scope" should be "slot"

Fixing bug where the current page was not cached as well.

This also generated the cache key automatically, or can be overwritten with a second optional parameter to the remember() method.