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
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
pcsclite: Upgrade from 1.8.8 -> 1.8.10
ruby/patches.nix: sort attributes alphabetically

And remove trailing whitespace.
silver-searcher: updated to 0.19.1
bangarang: fix build with gcc 4.7
vidalia: fix build with gcc-4.7
youtubeDL: update from 2014.01.23.4 to 2014.01.30.2
kmod-blacklist-ubuntu: fetch from tar.gz, not bazaar

Now the source is just a miniature archive.