pypy: 2.2.1 -> 2.3.1
Allow to keep visudo. Useful for checking sudoers syntax
Enable checking sudoers syntax. Fixes #2850, probably.
gperftools: Update 2.1 -> 2.2
libedit: Update 20130712 -> 20140213
snappy: Update 1.1.1 -> 1.1.2
libatomic-ops: Add derivation
xfsprogs: Update 3.1.11 -> 3.2.0

Additionally, enable the installation of the dev files so that we output
headers and shared libraries.
ceph: Add derivation

Additionally, add myself as a maintainer