[EXIF reading] - patch of problem for reading data
comment of lines which calculate the good focal length and the F-number to avoid division by zero
use of a elseif to take into account the EXIF readen in the caption of the image
rework of the syntax to pend exif info to caption
[Display of folder] - patch of issue when nothing to display
Correction of the call of the function when no picture nor default image exist
Merge pull request #23 from OranginaRouge/master

Correction of EXIF reading and display of folder icon