Authors:
-----------
Dan Dennedy				-- V4L, first video overlay and capture
Damien Douxchamps			-- The rest

Contributors:
--------------
Yasutoshi Onishi			-- big help debugging Format7
Xiong Quanren				-- big help debugging Bayer decoding functions
Marcu Lim				-- test pattern function (discontinued)
Andreas Micklei				-- Bus topology functions
Olaf Ronneberger			-- Format7 massive debug

