Fix exif/raw_exif and add datetime documentation
Fix exif/raw_exif and add datetime documentation

Ferada/sigal,jdn06/sigal,franek/sigal,saimn/sigal,xouillet/sigal,saimn/sigal,elaOnMars/sigal,cbosdo/sigal,xouillet/sigal,xouillet/sigal,kontza/sigal,elaOnMars/sigal,t-animal/sigal,muggenhor/sigal,jdn06/sigal,t-animal/sigal,Ferada/sigal,jasuarez/sigal,kontza/sigal,saimn/sigal,jdn06/sigal,franek/sigal,kontza/sigal,t-animal/sigal,muggenhor/sigal,cbosdo/sigal,Ferada/sigal,jasuarez/sigal,cbosdo/sigal,jasuarez/sigal