Add basic cmake build instructions.
Delete empty file NEWS.
Rework of the README and the English help page files.
Update some cmake files with latest macros.
libXv and libXext are handled by cmake intern modules through X11 variables.
Few cosmetics.
Signed-off-by: gregory guy <gregory-tde@laposte.net>
A man page taken fron the Debian packaging system has
been added.
Signed-off-by: gregory guy <gregory-tde@laposte.net>
Signed-off-by: Slávek Banko <slavek.banko@axis.cz>