while. This fixes ticket #342.
The bug is that we were using $item instead of $theme->item(). But we
were also not special casing tags properly, and they are effectively
first class citizens (at least for now) so treat them properly. Also,
set page_title by default in the theme so that we don't have to do an
empty() check on it (makes the theme easier to read) and move the
title out of Tags_Controller so that the theme has more control over
it.
Kohana makes this type of transition fairly straightforward in that
all controllers/helpers/etc are still located in the cascading
filesystem without any extra effort, except that I've temporarily
added a hack to force modules/gallery into the module path.
Rename what's left of "core" to be "application" so that it conforms
more closely to the Kohana standard (basically, just
application/config/config.php which is the minimal thing that you need
in the application directory)
There's still considerable work left to be done here.
