Add links for references to class templates.
Add links for the base class of a class template when the
base class is also a template and dependent on the type
parameters of the derived class template.
Add links for template parameters
Add the omniglot plugin, which can provide links to blame for both hg and git.

This changeset is a partial fix for bug 842641.

--HG--
extra : rebase_source : d99e59def249fe23ff99bab49c783e6b791e3752