beamer template: Provide `\Oldincludegraphics` as in LaTeX template.

The template redefines `\includegraphics` to give special treatment
for too-wide images.  But this causes problems for literal uses
of `\includegraphics`. This change allows authors to use
`\Oldincludegraphics`, as in the latex template.

1 files changed, 12 insertions, 7 deletions

diff --git a/data/templates b/data/templates
-Subproject 81c3b759b6e30af512ea0e81f85c8685b036624
+Subproject 25f999ad52d110575590ba900c33b48486e9ac2