QML UI: Allow shortcut prefixes in UI (bug 1949)

Due to the way the QML UI re-uses the search field as
URL entry field, we have to special-case additional
prefixes, so that they are properly detected in the UI.
Added (incomplete) support for The Escapist

This adds incomplete support for video podcasts from The Escapist.
The Podcast is added, with cover art and all, but the episodes still don't show up to test
if it's possible to download.
Make sure the JSON is written in canonical form

This uses the `sort_keys` functionality of python's JSON module
to make sure the settings file doesn't change when the settings don't change.
Completed The Escapist support

This completes escapist support by fixing a typo in the model and
fixing a wrong regex.
Merge pull request #123 from somini/master

Adds support for The Escapist Video podcasts
Gtk UI: Keep reference to last "add podcast" dialog (bug 1021)
Install scheme handler for gpodder://, feed://, podcast:// and pcast://

This allows subscribing from within a webbrowser by linking to
gpodder:// (and then the full URL of the feed).
escapist_video: Return early when no match
Vimeo: Support for selecting file format (bug 1954)
Update enqueue_in_mediaplayer.py

Add support to Parole Media Player (XFCE Mediaplayer)
Merge pull request #125 from dmaglio/patch-1

Update enqueue_in_mediaplayer.py
win32-launcher: Allow cross-compilation from Linux
win32-setup: Automate cross-building of installer
win32-portable: Makefile for automatic release builds
win32-setup: Make sure translations and modules are added
Support gpodder:// URLs on Windows (setup variant only)

For now, we don't support gpodder:// URLs for the portable
(.zip) version, to not pollute the user's registry.
Windows: Support for detecting media players

For now, we can only detect a hardcoded list, but it's better than
previously where we didn't have any support for players on Win32.
Gtk UI: New podcast directory UI
gpodder.query: Also search in episode descriptions
Fix mingw cross compiler compatiblity for Debian