Merge pull request #4387 from 1126/refactor-stumpwm

stumpwm: update and refactoring
Merge pull request #4503 from vbgl/tagaini

Adds Tagaini Jisho
thc-hydra: fix download url
Adding mailsend tool
help2man: update from 1.46.3 to 1.46.4
Update broadcom-sta and fix for new kernels
texlive: Updated to latest release 2014.20140927
Revert "tagainijisho: new derivation"

This reverts commit d62b63d3190f46ae75b0dbbbc42cd2b450c4ba65.

Fails to download dependencies. See http://hydra.nixos.org/build/15845724
python: make 2.6 and 2.7 expr similar, introduce includeModules

When includeModules is true, python is built with all optional modules
as part of derivation.
pythonFull -> python with all modules, pythonFullWithPkgs -> buildEnv
logstash service: make log verbosity configurable.
lttng: update to latest (2.4.1 -> 2.5.0)

- This unbreaks lttng linux kernel modules[1]
- lttng-tools has grown a dependency on libxml2

[1]: Build tested (for default NixOS Linux kernel) and run tested with
lttng-sessiond (it successfully loads kernel modules).
Merge pull request #4400 from matejc/seeksservice

seeks: update and write nixos module
coqPackages.ssreflect, more: build ssrcoq binary, add maintainer
closes #463 pythonPackages now uses self variable instead of rec builtin
chicken: Implement support for bootstrap-builds

This is necessary in order to apply custom patches, as chicken needs a
bootstrap build to regenerate *.c files. This is also necessary when
building from git.
Infrastructure to build chicken eggs.
Implement patches.nix to override parts of a derivation
rename patches -> overrides
Add chicken to PATH of wrapped chicken binaries.