teaser w/ strip and preamble tweaks

[taiya]

Found a much better way to get two-column teasers integrated (credit: Jan Held)
Also, added a few goodies for "auto-naming" of references based on file names.

[cr333]

Thanks for your patience. These are good changes. I'm enclosing some suggested minor improvements.

Maybe there is a bit too much space above the teaser? I would probably remove an em or so:

[cr333]

Nit: I think it would look slightly nicer to make the images fill the complete page width.

Suggested change

	\includegraphics[width=.325\linewidth]{example-image-golden}
	\includegraphics[width=.325\linewidth]{example-image-golden}
	\includegraphics[width=.325\linewidth]{example-image-golden}
	\includegraphics[width=.33\linewidth]{example-image-golden}\hfill
	\includegraphics[width=.33\linewidth]{example-image-golden}\hfill
	\includegraphics[width=.33\linewidth]{example-image-golden}

[cr333]

Temporarily disables hypcap around \captionof to suppress the warning about hyperlink anchors not working outside float environments. Re-enables it immediately after so all other figures retain the default behavior.

Suggested change

	\captionof{figure}{\textbf{Teaser} -- example of a 2-column teaser. This figure appears at the top of the first page, and a two-column teaser is not mandatory.}
	\captionsetup{hypcap=false}
	\captionof{figure}{\textbf{Teaser} -- example of a 2-column teaser. This figure appears at the top of the first page, and a two-column teaser is not mandatory.}
	\captionsetup{hypcap=true}

[cr333]

Added % at end to consume the trailing whitespace/newline before \end{strip}, fixing chktex warning W24 about spacing affecting page references.

Suggested change

	\label{fig:\currfilebase}
	\label{fig:\currfilebase}%