Making ccrtp propagate its build time requirement, ucommon.
As libccrtp propagates ucommon, it's not needed in libzrtpcpp.
Update ucommon to 6.0.5.

The hope that newer means better.
Adding partially sflphone (only daemon, maybe failing to build)
Making sflphone build, and its gnome client too.
Adding sflphone.

Merge branch 'sflphone'
python-six: Update to 1.3.0
python-mrbob: fix it and update to 0.1a9
Fix binutils_deterministic to not break evaluation in certain cases. Quite a sneaky bug!
Merge pull request #681 from offlinehacker/mrbob_fix

python-mrbob: Make it work, update to 0.1a9 and update python-six to 1.3.0
Linux 3.4: Doesn't support CONFIG_RC_DEVICES option
Process /etc/fonts/conf.d before upstream fonts/conf.d

Otherwise the user won't be able to override anything specified in
NixOS' /etc/fonts/conf.d, since ~/.config/fontconfig is included from
upstream fonts/conf.5/50-user.conf.
google-talk-plugin: Enable screen sharing
disnix: push to latest 0.3 development release
moderntimeline: Add extra source URL
maintainers: change my attrname to be uniform
liferea: add -- A GTK-based news feed reader
whitespace cleaning
libpng: keep versioning in all-packages.nix, not in individual expressions
libpng: merge apng expression (keep patch disabled by default)

I made sure no rebuild will happen because of this.
Unfortunately this meant merging attrsets instead of just using an
optionalString for postPatch