Merge branch 'master' into projectors

Conflicts were nearly all import skew due to removal of imglib2-io.

Conflicts:
	core/src/main/java/net/imglib2/display/VolatileXYRandomAccessibleProjector.java
	examples/src/main/java/interactive/Interactive3DRealRandomAccessibleExample.java
	examples/src/main/java/interactive/MandelbrotRealViewer2DExample.java
	tests/src/test/java/tests/LanczosExample.java
	tests/src/test/java/tests/OpenAndDisplayAffineTransformedScreenImage.java