* UpdateManager/GtkProgress.py: - remove window title on cache progress (LP: #549936) * check-new-release-gtk: - if no ReleaseNotesHtml key is found, do nothing (it means the meta-release file does not support this client) * check-new-release-gtk, UpdateManager/Core/MetaRelease.py: - improve debugging * UpdateManager/Core/utils.py: - add META_RELEASE_FAKE_CODENAME environment that can be used to test/force release upgrades * check-new-release-gtk: - append language parameter to uri - support --debug