- "gradient" is prefix of "gradient2" and the first was checked earlier
thus gradient2 was never selected
- incorrect check for boundaries with min instead of max
Smpte bars doesn't have the eight colum as EBU has.
Moreover the pattern is not complete - the bottom third contains
different data - mention this in help + todo.
Added raw image data generator that user can use to provide raw image
data that won't be color-converted. This could be useful eg. for testing
out-of-range YUV values.