QML UI: Show playback position in episode list

Signed-off-by: Nelson Ferreira <nelson.ferreira@ieee.org>
QML UI: Add shownotes button to media player

Signed-off-by: Nelson Ferreira <nelson.ferreira@ieee.org>
QML UI: Show the download filename in the shownotes

Signed-off-by: Nelson Ferreira <nelson.ferreira@ieee.org>
Download: Avoid bogus error messages (bug 1731)
Cleanup feed parsing, remove some special-cases
Model: Fix cover_url setting
Model: Don't track changes in model objects
Model: Various cleanups/simplifications
Model: Whitespace and indentation fixes
Util: Parse HH:MM-style strings with HH > 59
Add support for the opus audio codec (bug 1734)
Added notification bubbles on Windows (bug 426)
Fix GtkWarning from the shownotes (bug 1735)
Fix: Switching between shownotes can cause window to expand (bug 1736)
Add new extension (bug 1733) and correct some errors

New extension to convert ogg to mp3
few bugfixes in other extensions
Win32: Remove execute bit on notification-win32 extension
Extensions: Cleanup Windows notification extension
Extensions: Remove broken Woodchuck extension

After the simplifications of the model objects, the
Woodchuck extension is broken for now. If somebody
wants to take ownership of that extension and fix it
up for re-inclusion, please get in touch.
Vimeo: Use video title as download filename
Util: Improve parse_time() function