* .gitignore sort and remove duplicates
* show more warnings in tests
* add/update masks for rendering checks on windows
* fix delimited text provider tests
* disable QgsLogger and QgsPalLabelingServer on windows
Masks set which pixels in the control image should be tested and
an optional tolerance for each pixel. This is done via the colors
in the mask image - white pixels are ignored, black must be an
exact match, and gray levels represent the maximum color component
deviation for that pixel.
This should replace the fragile anomaly images, in that a single
control image with a suitable mask will not be susceptible to
antialiasing differences, etc.
A new script (scripts/generate_test_mask_image.py) is included which
either creates a new mask or modifies an existing mask to handle
an acceptable rendered image.
Ultimately, masking along with multi render checks for specific
platform differences should be flexible enough to meet our needs.
It was necessary to add a new 'table background' color option to prevent
regressions when loading old compositions, since users may desire
the old behaviour where the entire frame is filled.
