uncomplicate format string expr to address -Wformat in patterns.cc
edfhed.cc: #include argp.h after some cpp includes to obviate spurious id clashes when building with g++-4.8
straighter args to map::assign for pickier g++-4.8 standards
trivial comments and include touchups in edfhed-gtk.cc
prepare for 0.8.1
one more -Wformat issues