Ignore 'Torrent addition dialog' setting if the file doesn't exist:

Allows to post error message to log
[WIP] Implement open & select file in file manager
Add setting to ignore RSS rule matches for X days
Implement episode filter for rss downloader

Conflicts:
	src/rss/automatedrssdownloader.cpp
	src/rss/automatedrssdownloader.h
	src/rss/rssdownloadrule.cpp
Add tooltip to episode filter text edit
Modify configure script to support both Qt4 and Qt5 (also modify qconf project and modules to produce such script).
Add QHttp* classes dropped in Qt5.
Update QtSingleApplication.
Fix functions and macros using to support both Qt4 and Qt5.
Revert unintended changes
Fix translations bundled with Qt.
Support shutdown deferral on Windows Vista+