Links to functions in reference documentation need to be fixed urls

[iamveritas]

this is how a link to the function modify() in the mandel.cdt reference documentation gets generated: http://localhost:8080/mandel-cdt/group__multiindex.html#ga4b3556ef69c7faa917f185ae33a34442

the anchor seems to be a GUID which will be different each time the doc gets generated we need these anchors to be fixed so we can use them in docs and link to functions reference documentation.

Later edit: the GUIDs are generated the same way (fixed) all the time but we could improve

1. the double underscores could be simplified
2. instead of GUIDs have integers?... or a human readable anchor

[ericpassmore]

partially fixed in new release. Just need distinct URLs for each function. Specifically same name different arguments.

[greg7mdp]

I think the links are missing a '/' character in them to be correct.

They should be:
http://localhost:8080/mandel-cdt/group__multiindex.html/#ga4b3556ef69c7faa917f185ae33a34442
instead of
http://localhost:8080/mandel-cdt/group__multiindex.html#ga4b3556ef69c7faa917f185ae33a34442

On this page the links to anchors are broken as well.