Move namePrefix="" python packages out of python-packges.nix

It doesn't make sense to build tools/applications with three different
python interpreter versions, so move them out of python modules list.

Also reverts 53ffc6e0ef395a2bd7651423d9783ad8184be1d0.
Merge pull request #794 from NixOS/python_move_nameprefix_packages

Move namePrefix="" python packages out of python-packges.nix
qemu: Update to 1.5.2
qemu-kvm: Remove

But install a qemu-kvm wrapper in qemu.
Use the qemu-kvm wrapper
qemu-kvm: Disambiguate
apr: Update to 1.4.8

Also drop the accept4 hack because Linux 2.6.32 is now the minimal
kernel version supported by Nixpkgs.
apr-util: Update to 1.5.2
openconnect and vpnc NetworkManager plugins added

also openvpn plugin updated to the same version as NetworkManager
adding description to networkmanager plugins
Merge pull request #735 from garbas/networkmanager

openconnect and vpnc NetworkManager plugins added
Updated Android SDK to version 22.05, updated all plugins, and added mesa to the search path of the emulators to enable OpenGL acceleration
Fixed incorrect platform-tools sha1 value
added dhex, a nice ncurses based hex editor for the shell
Merge branch 'dhex'
Now x86 and mips images from external repositories are supported + added GPU option to the emulate function
Merge branch 'master' of github.com:NixOS/nixpkgs
wicd: wrapper env vars prefix -> postfix

Change PATH=$PATH:deps to PATH=deps:$PATH in the wicd wrappers, because
the latter is more deterministic; it prevents possibly wrong versions of
dependencies to sneak in from the environment.

Do the same for PYTHONPATH.
linux: Don't put the kernel version in meta
Unify the Linux kernel configurations

Having N different copies of the NixOS kernel configuration is bad
because these copies tend to diverge.  For instance, our 3.10 config
lacked some modules that were enabled in older configs, probably
because the 3.10 config had been copied off an earlier version of some
older kernel config.

So now there is a single kernel config in common-config.nix.  It has a
few conditionals to deal with new/removed kernel options, but
otherwise it's pretty straightforward.

Also, a lot of cut&paste boilerplate between the kernel Nix
expressions is gone (such as preConfigure).