minor fix in nethack
this hack no longer needed.(why?)
gchemutils exists as gnome-chemistry-utils, delete it
improve acl2
improve stalin
remove cairo
use EXTRA_CONF and package.env to enable broadway backend for gtk+
LLVM_LIBDIR_SUFFIX for both 64bit and non-64bit arch
add rstudio-0.98.435.ebuild
drop old ess
add emacs support for mit-scheme-c
add geiser-9999
add paredit-23
update quack.ebuild
clean up app-emacs/