pull module blacklist from Ubuntu and use it by default

People often have serious problems due to bogus modules like *fb.
lightdm: Update to 1.8.6
lightdm-gtk-greeter: Update to 1.6.1
libsoup: enable introspection (gnome3 stuff needs it)

Also some minor refactoring of the expression.
release-small.nix: Disable FreeBSD
libyaml: Patch to fix CVE-2013-6393 (close #1658)
git-daemon service: fix typo in option (close #1659)
libusb1: minor update x-1.0.17 -> 1.0.18 (joined)

The forks joined (or rather libusbx continues under libusb name).
http://sourceforge.net/p/libusb/mailman/message/31886062/
directfb: update from 1.6.2 to 1.6.3

There is a 1.7.x release out but to minimize chances of breaking
dependees I'm only bumping the minimal needed to be compatible with
ilixi (a gui toolkit for directfb that I'm packaging).
directfb: add meta attributes
ilixi: new package

ilixi is a lightweight C++ GUI toolkit for embedded Linux systems.

http://ilixi.org/
python-dpkt: new package

dpkt is a fast, simple packet creation / parsing module, with
definitions for the basic TCP/IP protocols.
bcache-tools: new package

Bcache is a Linux kernel block layer cache. It allows one or more fast
disk drives such as flash-based solid state drives (SSDs) to act as a
cache for one or more slower hard disk drives.

This package contains the required user-space tools.

User documentation is in Documentation/bcache.txt in the Linux kernel
tree.

http://bcache.evilpiepirate.org/
xpra: fix package name

Remove the "python2.7-" prefix from the package name so that it can be
installed with "nix-env -i xpra".
Update cython
Add cython3 (python 3), move cython (python 2) to subfolder
IntelliJ IDEA version bump (13.0.1->13.0.2)
Fix previous simutrans 112.3 build

This fixes commit b5d19fad6710e786a80f9584e65f4f17e9678c24
xmlindent: New expression

[Bjørn Forsman <bjorn.forsman@gmail.com>:
 - introduce "name-${version}" (to not duplicate version number)
 - use mirror://sourceforge instead of specific mirror URL
 - add vertical whitespace between attributes
 - add meta description and homepage attributes
 - place the top-level 'xmlindent' attribute in alphabetial order
]
ccid: Update from 1.4.13 -> 1.4.14