Resolve "In painting has different output based on computer OS"

Closes #2 (closed)

As discussed in #2 (closed), small differences coming from difference linear algebra libraries can be amplified during further computation (especially in uint8 precision) and lead to slightly different output on different systems. This is not something that can be easily worked around, therefore the chosen solution is to increase the tolerance of the unit tests to allow for these small modifications.

added 5 commits

• aa03ba73 - Debuging differences in output of inpainting on CI runners
• 442475c6 - Implements more tolerant tests based on image distances
• 22898b8b - Fix canberra distance for input with elements equal to 0
• ecfe4a99 - Set epsilon to meaningfull value, clean up
• b1defaa0 - Merge branch 'debug_inpaint' into 2-in-painting-has-different-output-based-on-computer-os

Compare with previous version

changed the description

mentioned in issue #2 (closed)

unmarked as a Work In Progress

merged

mentioned in commit 0b584bf7

mentioned in issue bob#269 (closed)