Remove redundant line from ir_conversion
Remove mask field from AFunctionCallByIndex class
Rename ftable_name_and_index_for_fname to fname_to_ftable_index
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Improve grammar
Remove background colour global var
Add picture of ray tracer interface possibly to be included in the report
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Replace 0.1 by tinyValue in closestIntersectionPoint function
Remove comment, remove redundant call to vectorsDotProduct in ray tracer
Change default cast to throw exception in C conversion
Finish first version of Implementation chapter
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Add test case
Remove code duplication in run_tests.py
Add comments to run_tests.py
Tidy up testing code, comment