Implement "colour.chromatic_adaptation" convenient definition that transforms "CIE XYZ" tristimulus values from one viewing condition to another.

Closes #123.
Fix erroneous "CMCCAT2000" matrix.
Update various docstrings.
Update "colour.chromatic_adaptation_matrix" and "colour.chromatic_adaptation" definition signatures.
Update various docstrings.
Ensure docstrings consistency.
Merge pull request #124 from colour-science/feature/chromatic_adaptation

PR: Implement "colour.chromatic_adaptation" convenient definition that transforms "CIE XYZ" tristimulus values from one viewing condition to another.