Add disabled syntax for cpp functions

Found this old snippet. I should look into it next time
I am writing c++ and do not like the syntax highlighting.
sub: Update gitv and use new Plug maps

Ctrl maps are disabled. The ones I was using were disabled in an update,
so map them locally with the new Plug interface I added.
sub: update fugitive

Grab the latest which includes improved Gblame -- the doc is correct and
it does colour coding of commits to show age.