The QProcess::start() method is replaced with a new one that requires
executable path and arguments passed separately.
Each argument must be now passed individualy using QStringList and
have their spaces escaped automatically and passing argument
list as a single string would no longer work. This is now handled by
splitting the argument string on spaces.
The executable path can no longer contain quotes as spaces are escaped
by QT automatically now.
Windows builds sometimes use lf or crlf depending on how they are built.
With this change input should be parsed correctly whether it uses
crlf, lf or even just cr.
* use ug --capabilities for querying
* support for webcams on Windows and MacOS
* support for decklink capturers and modes
* query v4l2 through UltraGrid
* don't store state in ui widgets (preparation for saving/loading settings)
* automatic FEC
