vlada/ipe

Adding the ipe editor.

Signed-off-by: Vladimír Čunát <vcunat@gmail.com>
automake: add version 1.13.1
all-packages.nix: strip trailing whitespace
bristol: fix JACK audio support
nix: Update to 1.3

Also, use /etc/nix as the default configuration directory.  This way
$NIX_CONF_DIR no longer needs to be set in most cases.
libmicrohttpd: update; the old url didn't work

They take out old versions from the file server
gnunet: update to 0.9.5
update atop
bup: optionally depend on par2cmdline

The default is to use it from path when available, as this is an
optional feature.
SBCL: Update to 1.1.3
Wine: Update to 1.5.21
nzbget: Update to 9.0
samba, imagemagick: Add missing meta info
haskell-hashable: update (unused) 1.2.x version to 1.2.0.3
haskell-nats: add version 0.1
haskell-transformers-compat: add version 0.1
wxHaskell: patch wxc to fix build error
Jailbreak Haskell packages to deal with update of semigroups.
haskell-comonad-transformers: update to version 3.0.1
haskell-comonad: update to version 3.0.1.1