Update generated documentation for contributing page

[eugbaranov]

No description provided.

[simra]

Checking: this PR is into gh-pages, rather than master. It seems to be a distinct PR from #98 but I get the impression it's not necessary because the gh-pages branch is auto-generated. I'll wait for @tpetricek or @dsyme to weigh in.

[eugbaranov]

I can see that @dsyme updated gh-pages recently but apparently he did it before you approved #98 since those are not on the site yet.

[simra]

Thanks- I had the impression from @tpetricek that the gh-pages branch is auto-generated and no action is necessary. I'm not sure what triggers the merge, so I'll dig deeper this evening.

[eugbaranov]

I think although it is auto-generated it is not auto-commiting. :)

[tpetricek]

The gh-pages is updated when we release a new version of the library (which is done by running build Release locally). So we do not need to merge this PR, just run the release script again (which I'll do).