inserting files within remember templates

[Adam Spiers <orgmode@adamspiers.org>]

I'm finally getting around to setting up remember properly for regular
use.  One thing I think I'll need is the ability to include the
contents of an external file in a remember template at the time of
instantiation.  Or if there was a % escape sequence for executing
arbitrary elisp, that would be even better, of course.  Is there
anything like that at the moment?  I couldn't see anything in the
docs.