gpodder.util: Fix a bug in delete_empty_folders

The bug could have caused an empty directory in the current working
directory to be removed if an empty folder of the same name exists in
the download directory.
Dependency check: Mention tools/localdepends.py
Update de.po

Fix typo in german translation
Merge pull request #122 from EduardBaer/patch-1

Update de.po
Sailfish: Remove obsolete, Qt4-based Sailfish QML UI

The current Sailfish UI is maintained as part of gPodder 4 in
gpodder-core, gpodder-ui-qml and gpodder-sailfish. The code
removed here was part of the old, Qt4-based Sailfish Alpha
SDK-based port that was still using PySide and Python 2.
QML UI: Don't apply margin fix in landscape (bug 1915)

For some reason, we needed to apply a offset of 36 pixels, so that the
overlay sheet aligns with the window. However, this offset gives
problems in landscape (it also gives a visual glitch when the sheet is
closed, as it could be partially visible at the bottom of the window).
This fixes it by not applying the offset fix when the window is in
landscape mode or when the sheet is closed.

Thanks to Andi for reporting this issue.
QML UI: Use new JSON API for searching gpodder.net

This aligns with gPodder 4.x and also does things like sorting
results based on subscriber count, which makes more sense.
QML UI: Move filter to episode list header
QML UI: Also show spinner while episode list is loading

This gives a visual indication that even while the first few
items in the list are already visible, the list isn't fully
interactive (due to new items coming in regularly) yet.
QML UI: Copy feed URL to clipboard menu item (bug 1916)
QML UI: Two more sheet margin fixes (bug 1915)
QML UI: Better gpodder.net integration
QML UI: "Mark episodes as old" menu item for "All episodes"
QML UI: Scroll to top and bottom quickly (bug 1908)
QML UI: Elide text in podcast and episode lists
QML UI: Allow updating of episode list via pull down
QML UI: Nicer "pull down to refresh" animation
Win32 launcher: Fix download file name for custom folder (bug 1617)
Win32 launcher: Update to Python 2.7.8 and PyGTK 2.24.2
makefile: Force UTF-8 encoding in xgettext