-replaced the old ImageCache class with ImageCache2
-extracted the card picture- and detail code from GuiDisplay/DeckEditor into separate classes (in forge.gui.game). therefore, CardDetailUtil and forge.CardPanel were deleted. GuiDisplayUtil is no longer used to create the card panels.
TESTS:
-confirmed all changed GUIs (but the quest deck editor - changes are the same as normal deck editor) to show details and pictures.
-I played a game with reduced heap size (-Xmx200M). Occasionally the image cache size shrinked along with the used memory.
-In a game without reduced heap size (memory usage ~500M, over 1000 cached images), i noticed slowdown when some images were missing.
-I noticed the stack elements now having a border with the card's color; this doesn't hurt IMO.
NOT WORKING
I wasn't able to adapt one thing: GUI_PictureHQ, i just didn't know what it does. for everything else to work, some code sections were commented out and tagged with "TODO reenable"
