N.B.: I hate branching macros for a reason

this patch adds a parameter ( --[no]-scaling) and a toggle hotkey ('o')
At fullscreen, it allows displaying a video at original size surrounded by a black screen.
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

until we implement whatever we decided regard the authors files

Internal is now QStringList items and QString options (for the first Item, of course)

    There shouldn't be too many regressions, but testing is welcome

Signed-off-by: Rémi Denis-Courmont <rdenis@simphalempin.com>

Let's see if this fits courmisch's standards...

Osdmenu 'dvd' configuration is the same as 'default' configuration and 'minimal' is just a simple example. The 'default' configuration is descriptive enough in combination with doxygen comments.

Rewording of some categories of Preferences, avoid "General" as a title and using "VLC", every other two lines...

Grrr a library that does exit on its own !

Noticed by courmish.

(X11 has a similar bug, not to how to fix it)

It fixes an assert in vout code when a stream was stopped while paused.