* apps/bench/dilation-lena.cc
	(nongen::dilation)
	(nongen_2ptr::dilation)
	(nongen_1ptr::dilation)
	(gen::dilation)
	(fast::dilation)
	(fast_noaccu::dilation)
	(faster::dilation)
	(faster_noaccu::dilation)
	(fast_static::dilation)
	(faster_static::dilation):
	Move functions...
	* apps/bench/dilation-lena.hh: ...here (new file).
	* apps/bench/dilation-lena.cc: Adjust.
	* apps/bench/Makefile.am (noinst_HEADERS): Add dilation-lena.hh