MRA/KMLExporter: Little fix on name of dvl layer created file.
MRA/KMLExporter: Fixed problem that when the samplesPerPixel were 1, the values used for the pixel to paint was NaN. The result was a black sidescan images. (Fixed along with previous commit 1a72c5d.)
MRA/KMLExporter: Fixed problem with calculation of samplesPerPixel.
MRA/KMLExporter: Fixed problem with matching pixels from data into pixels in image from sampling. The symptom was a sidescan image that was cropped on the right side and also the middle was not on the middle (was shifted right), and also the nadir was not properly calculated due to the center shift.