* moved images from main to outer
* added EventImageDirectoryChanged
* added EventImageDirectoryChosen
reacts to EventImageDirectoryChosen, changes config and publishes
EventImageDirectoryChanged
hooked up to use openfolder function
relayed primaryStage to controller (probably temporary)
implemented functions to open folder
fixed typo resou(r)ces
cleanup
cleanup
switching to preferences
change to preferences
removed all old properties but they stay, maybe used later on
try to load last image directory
renamed on to handle
close app on ESCAPE
added handler for ENTER > fullscreen