Reduce dependency footprint of gst-python.

The gst-python package actually is perfectly happy with pygobject and
does not require pygtk.
Disable failing test case.

The test fails due to bug in the pygobject dependency.
scala: Bump up version from 2.11.2 to 2.11.4
mbox does not support i686
Merge pull request #4755 from ehmry/mbox

mbox does not support i686
postgresql 9.4beta3, but keep beta2 around because they are not compatible
nixos/nat: Fix override so that sysctls are properly preserved
easytag: update from 2.2.4 to 2.3.1

Also cleanup: preConfigure seems to not be necessary, gtk2 support was
dropped, wrapping done so it doesn't crash at startup and icon theme
pulled in.
tibia: update to 10.61
python: 3.2.5 -> 3.2.6
python: 3.3.5 -> 3.3.6
Document likely breakage when people update the kernel.
camlimages: update from 4.0.1 to 4.1.2

Previous version 4.0.1 is kept for OCaml 3.12
Merge pull request #4759 from alexanderkjeldaas/do-not-break-grsecurity

Document likely breakage when people update the kernel.
Merge pull request #4721 from rycee/gst-python

Cleanups of legacy gst-python package
Merge pull request #4758 from vbgl/camlimages

camlimages: update from 4.0.1 to 4.1.2
mongodb: 2.6.4 -> 2.6.5
calibre: update from 2.7.0 to 2.8.0
Merge pull request #4753 from taku0/scala_2_11_4

scala: Bump up version from 2.11.2 to 2.11.4
R: update to version R-3.1.2