ChangeLog

release
 - shiny/selenium tests
 - display time/location on mouseover
 x cleanup directories
 x resource file containing text/translations
 x table/filter containing exif information
 x tabbing: import, filter, display
 x timeline: in new tab or linked to map
 x mobile optimization
 x replace column layout by fullscreen layout: worldmap as default view

future
 - exif-js(https://github.com/exif-js/exif-js)
 - client side compression (http://makeitsolutions.com/labs/jic/)
 - social media sharing (possibly https://shiny.rstudio.com/articles/bookmarking-state.html if persistent file storage possible)
 - context menu: open image in new tab, download
 - mouseover: display image in full size
 - mouseover: display image in sidebar