deactivate qgis_wcsprovidertest

Disabling on behalf of @m-kuhn since the wcs server used in qgis_wcsprovidertest is not really reliable. Often the test fails due to server problem.
We should use a more solid server or make the test handle connections problems
Fix #9604 - New icon for delete selected features
travis: disable qgis_wcsprovidertest due to unreliable server
restore setting of scene to map canvas items (followup 78c51954)
update INSTALL (fixes #11715)
- remove outdate "practical case" section
- include pointer to GDAL formats for build instructions for proprietary
  formats in overview
- cosmetics
better fix for b99ab0a
getProjectSettings response: return 'maptip' instead of tooltip template as
displayField layer attribute
Make the "Merge shapefiles" tool correctly handle features without geometries.
Add support for weighting points by expression to heatmap renderer
[processing] fixed help in models
Merge pull request #1697 from mbernasocchi/patch-1

deactivate qgis_wcsprovidertest on travis

It depends on an unreliable external service and therefore produces false alarms.
add a save button for subform (1-n relations)
clean code style with prepare-commit.sh
remove repaint when layer is not modified
Fix crash on exit: Close all cached sqlite connections
Remove help button from symbollevelv2 dialog

There is no help text available for this dialog and the button does nothing at
all at the moment
Fix #10727 - Add update selected button to field calc bar
Add toolbar icon and shortcut for python console
Fix potential crash in random color ramp

Badly choosen values (eg max < min) could cause a crash. Now, values
are sanitised prior to generating the ramp colors.
Fix grammar