VarQTEResult missing from API ref.

[woodsp-ibm]

Summary

VarQite and VarQrte return a VarQTETResult but it was missing from the API ref. I added it so the result return from the evolve methods now can correctly link to this the result.

Details and comments

I marked it for backport as we can re-publish the docs so as to update them to include this.

[coveralls]

Pull Request Test Coverage Report for Build 6433751598

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 90.516%

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Totals
Change from base Build 6172410099:	0.0%
Covered Lines:	6452
Relevant Lines:	7128

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💛 - Coveralls