nix-exec: bump
libxml2: 2.9.1 -> 2.9.2 (CVE-2014-3660) fixes #4679
rsnapshot: add git version & make it configurable in the nixos module
rsnapshot: add (commented) code for an idea that did not work out yet
dovecot: Update from 2.2.14 to 2.2.15
postfix: Update from 2.11.1 to 2.11.3
arduino-core: fixup ELF interperter paths in prebuilt binaries

Fixes #4688
titaniumenv: Make iOS SDK version configurable in example
quassel: 0.10.0 -> 0.11.0
Ats2: bump
quassel: Fix evaluation
haskell-idris: update to version 0.9.15
Added ocaml-cairo2-0.4.6
Merge branch 'ocaml-cairo2' into my-stuff