Range compress #419
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Range compress #419
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Adds a Ranged based (pre) compressor
Note expected to get any better compression results than the pair compressor
However significantly faster and as the results are not order dependent can be combined with any other compressor.
If there are holes in the masks that cause entries to overlap the uncompressed table is returned.
Note the unitests included compare_tables which is the slowest part of the test.