ISO for 2015-04-17

[Harald Sitter]

http://files.kde.org/snapshots/unstable-amd64-latest.iso.mirrorlist

This ISO was created using the Plasma/5.3 branch as of earlier today.
Until release the ISO will continue to be using Plasma 5.3 builds,
also see last week's mail for information.

# changes
- ISO using Plasma/5.3 and Applications/15.04
- do note that this ISO uses a different package archive than the
usual ISO, so if you install this on a system and want to upgrade it
to the unstable builds you'll need to enable the unstable PPA (see
below)

# errata
- extra software that is not marked for stable integration (notably
everything that isn't frameworks|plasma|applications) is not available
for installation. if a certain package can not be installed chances
are that it only has an unstable build and will need the unstable
archive added with sudo apt-add-repository ppa:kubuntu-ci/unstable &&
sudo apt update. do note that this will however also bring in plasma
master builds.
- on the initial installer dialog the window decoration is completely
busted and rendering entirely black most of the time. this appears
pretty consistently with vbox and kvm virtual machines. my hardware
test machine did not exhibit the issue though, so this might be
somewhat timing dependent. this is apparently caused by kwin not being
able to load the color scheme; see my comment on the relevant RR [1]

# long standing errata
- the ISO is rolled using the CI landing PPA due to stabilization
blockage from missing bluez5. this in turn means that upgrades
potentially won't work or break half way through as the underlying PPA
breaks ever so often.

[1] https://git.reviewboard.kde.org/r/123320/