TWEAK: compat with NRAO casacore
TWEAK: CMakeLists.txt: avoid LD_LIBRARY_ foo with rpath magic
src/gui/imagewidget.cpp: use NEAREST filter for image scaling

When zooming in to more than one on-screen pixel per data pixel,
this gives us nice discrete zoomed-in pixels, rather than soft
blending between them all.
TWEAK: CMakeLists.txt: link casa_lattices; not sure if needed, actually
TWEAK: src/msio/scalarcolumniterator.h: track casacore API

ROScalarColumn replaced with a define to ScalarColumn.
TWEAK: make bg display work again
TWEAK: src/aoflagger.cpp: uniform spacing of percentage output
TWEAK: src/aoflagger.cpp: progress reporting all on one line
TWEAK: src/strategy/actions/baselineselectionaction.cpp: quieter
TWEAK: src/aoflagger.cpp: no long startup message
TWEAK: add 'quiet' option