Manpages of src:libpgplot-perl in Debian unstable

• PDL::Demos::PGPLOT(3pm)
• PDL::Demos::PGPLOT_OO(3pm)
• PDL::Graphics::Demo(3pm)
• PDL::Graphics::LUT(3pm)
• PDL::Graphics::PGPLOT(3pm)
• PDL::Graphics::PGPLOT::Demo(3pm)
• PDL::Graphics::PGPLOT::Window(3pm)
• PDL::Graphics::PGPLOTOptions(3pm)
• PGPLOT(3pm)
• pgperl(3)