HEADS UP: Switched to 1.8 source/target in build (in graphics repository).

[Martin Sladecek]

Hi,
just pushed a changeset 831d74ba3576 (FilteredList/SortedList) that 
switched javac.source and javac.target parameters to 1.8.

This means the (graphics) repository is no longer buildable with JDK7.

Regards,
-Martin