skip validation of manpages
cleanup manpages
fix typo for save as raw filter
Merge branch 'master' of https://github.com/crep4ever/matrix-viewer
fix spelling mistakes
Merge branch 'master' of https://github.com/crep4ever/matrix-viewer
Merge branch 'master' of https://github.com/crep4ever/matrix-viewer

Conflicts:
	src/main-window.cc
keep image sync when matrix model changes
cleanup redraw image
add several opencv operations to matrix model
style cleanup
new dialog to apply opencv operations
integration of operations dialog
use raster graphis system
fix build warning
rename histogram-dialog -> histogram-widget
rework histogram
catch opencv exceptions
lazy init for histograms
cleanup mfe support