smpeg: fix smpeg-config
SDL_mixer: add mp3 support
onscripter-en: add package
chruby: allow for specifying Rubies to use

This allows the user to specify an attrset of Rubies to use with chruby by
overriding the default of ~/.rubies with a path to a symlink tree.
manpages: update from 3.74 to 3.75
swiProlog: update from 6.6.5 to 6.6.6
logcheck: update from 1.3.16 to 1.3.17
oxygen-gtk3: update from 1.4.0 to 1.4.1
qjackctl: update from 0.3.11 to 0.3.12
enca: update from 1.15 to 1.16
checkstyle: update from 5.8 to 6.0
youtube-dl: update from 2014.10.13 to 2014.10.25
perlPackages.Encode: update from 2.55 to 2.63
Merge pull request #4630 from abbradar/onscripter

add "onscripter-en" package
firefox: Update to 33.0.1
Add nodejs to the small channel

(cherry picked from commit d927ce03e4ad3d65f64eb2ddad970ec08f47fffc)
linux: Update to 3.12.31
Upgrade boto to support eu-central-1 region.
Refactor EC2 image generation script. Now uses same procedure for both hvm and pv-grub
images. Root disks are now SSD backed and 20GB by default, both on hvm and pv-grub
(previously was 8GB for HVM). Added new eu-central region to the locations to copy images
to. Also the root disk for HVM instances was not deleted on termination with previous
images, this is fixed as well.
Update to latest awscli