We currently specify that dvips be used. This could potentially
change in the future. One issue is that with system fonts XeTeX and
LuaTeX do not correctly rotate pages.
Re-structure and rename files in a transparent way. Most template/example
names now correspond to the (verbose GUI) name of their layouts.
Note that this, most prominently, also changes [LANG/]splash.lyx to
something less insiderish, namely "Welcome.lyx".