nixos/xfce: don't set a bloated GST_PLUGIN_PATH
nixos/environment: do not set GST_PLUGIN_SYSTEM_PATH
xfce4-mixer: use wrapper to set GST_PLUGIN_SYSTEM_PATH
Add a builder for Agda packages.
Use agda builder for stdlib. mv to all-packages
ocaml-javalib, ocaml-sawja: removes wrong path to bash in
configure scripts
mpi4py: New package, version 1.3.1
h5py: New package, version 2.3.1
gummiboot/builder: fix timeout setting when unset

The gummiboot-builder.py script is expecting the @timeout@ metavar to be
substituted for either an empty string (in the case where a user has
left the timeout unset) or the actual value set in the system
configuration.

However, the config.boot.loader.gummiboot.timeout option defaults to
'null', and due to the way pkgs.substituteAll works, the substitution
for '@timeout@' is _never_ set to the empty string.  This causes the
builder script to put a bogus line into /boot/loader/loader.conf:

   timeout @timeout@

Fix this by explicitly setting 'timeout' to the empty string when it's
unset in the system configuration.

Signed-off-by: Josh Cartwright <joshc@eso.teric.us>
Update oraclejdk-7 patch version from 65 to 67
mpi4py: Adhere to package description convention
h5py: Adhere to package description convention
ocaml-javalib, ocaml-sawja: uses patchShebangs rather than ad-hoc patches
nixos/utils: Don't remove first character if not a /
Merge pull request #3962 from wkennington/master.iffix

nixos/utils: Don't remove first character if not a /
nixos nat: add type for sourcePort and destination of forwardPorts
Fix QScintilla source
Merge pull request #3915 from Fuuzetsu/agda-builder

RFC: Agda builder
nixos nat: add description to forwardPorts
Add curl-unix-socket, Run HTTP requests over UNIX socket