Implement support for "CGATS" file format.

[thomasmansencal]

This file format is typically used by X-Rite to provide their ColorChecker data. I have some code to parse it somewhere and it should probably be integrated in Colour directly.

References

• https://webstore.ansi.org/RecordDetail.aspx?sku=ANSI%2fCGATS.17%3a2009+(R2015)
• https://github.com/mironovd/ccss2edr

[parthxtripathi]

@KelSolaar the 1st link in the reference is showing "This standard is not included in any packages". Could you please help me with it?

[thomasmansencal]

@parthxtripathi: The link seems to be fine from here.