fix pangomm build: use cairo 1.12.2
nixpkgs-lint: Fix priority check
Fix some name collisions
webkitSVN: Remove

It hasn't been updated in a long time.
Fix a name collision between glibc and glibc217
Fix a name collision between two distinct KDE wallpaper packages
linux: Update to 3.2.49, 3.4.55
batman-adv: Disambiguate kernel versions
Make phpXdebug_5_3 low priority
nixpkgs-lint: Warn against capitalised package names and missing versions
MicroGNUEmacs, a.k.a. MG
offlineimap: remove python prefix from package name

OfflineIMAP is primarily a program/tool, not a python module (although
it installs a python module too, for those who want to poke at its
internals).

Now we can install it with "nix-env -i offlineimap" instead of
"nix-env -i python2.7-offlineimap".
Drop recurseIntoAttrs from python33Packages and pypyPackages.

We cannot import the packages from all of these three packages sets into
the global namespace, because they are indistinguishable. For example:

  $ nix-env -qaP \* | grep pylint
  pypyPackages.pylint                 pylint-0.26.0
  python33Packages.pylint             pylint-0.26.0
  python27Packages.pylint             pylint-0.26.0

When someone tries to install pylint by running "nix-env -i pylint",
then it's impossible to tell which one of these three versions was
chosen.

I can think of two ways to remedy this problem with recurseIntoAttrs:

 1) Bake the name of the Python interpreter into every package's name,
    i.e. offer "python27-pylint", "python33-pylint", and so on.

 2) Ensure that all non-default package sets mark all their packages
    'lowPrio' to unsure that the choice during installation is
    deterministic.
all-packages.nix: drop trailing whitespace
haskell-cmdargs: update to version 0.10.5
haskell-feed: update to version 0.3.9
haskell-haskell-src-meta: update to version 0.6.0.3
haskell-unix-process-conduit: update to version 0.2.1.2
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