New packages: pam_mount and libHX

Add pam_mount package. Integration into NixOS is still missing.
Merge branch 'upstream' into pam_mount

Conflicts:
	pkgs/top-level/all-packages.nix
Fix description in pam_mount and libHX. Add tstrobel as maintainer.
added alock package
rustc: fixed build after 7068828389390dca066fb1062bd27148d49339d4

That commit changed the patch to work for the new HEAD, but that new
patch breaks 0.11. I made two patch for the two versions.
haskellPackages: introduced ShellCheck.
Merge pull request #4126 from aycanirican/introduce_haskellPackages_sellcheck

haskellPackages: introduced ShellCheck.
Merge pull request #4092 from ts468/pam_mount

New packages: pam_mount and libHX
add xvidcap to the channel for linux
nodejs: Bump to version 0.10.32
nixos: add collectd module
nixos/graphite: add seyren service, graphite alerting dashboard
pythonPackages.graphite_api: fix testing, make more nix-shell friendly
nixos/graphite: add package option to graphiteApi
seyren: udpate to 1.1.0
Quick hack to reduce Hydra memory consumption
collectd: add pidFile option, change default pid to /var/run/collectd.pid
syslog-ng module: Add package option
Added httptunnel package.
wicd: add urwid and curses to PYTHONPATH of wicd-curses