[Fix #7405] Graduated renderer: Feature count 0 with scale or rotation
drop qgis_help.db and debian packaging update
raster resampler fixes, use zoom in resampler also for oversampling 1
Merge pull request #592 from matthias-kuhn/fix-7405

[Fix #7405] Graduated renderer: Feature count 0 with scale or rotation
modified topology checker mostly GUI overhaul
Return rgb from all colour functions
Add aplha to colour ramp
Return rgba from ramp_color
Merge pull request #593 from mach0/topocheck

modified topology checker mostly GUI overhaul
split part of multi-geometry