Add haskellPackages.heredoc

Signed-off-by: Shea Levy <shea@shealevy.com>
Add haskellPackages.robotsTxt

Signed-off-by: Shea Levy <shea@shealevy.com>
Update node packages

Signed-off-by: Shea Levy <shea@shealevy.com>
Merge pull request #1419 from wkennington/btrfs

Updated btrfsprogs from 0.20-git -> 3.12
pythonPackages: add pyramid_debugtoolbar, robotframework_selenium2library, robotsuite and nose-selecttests
salut-a-toi: remove distribute dependency (not needed)
Fixed a code typo in the documentation
Fix btrfsprogs so nix detects the version

Currently, btrfsprogs is misdetected by nix such that it requires
specifying btrfs-progs-v3.12 for install instead of just btrfs-progs.
This patch removes the v so that it now reads btrfs-progs-3.12 and is
properly detected by nix.