Git ignore: ignore cabal sandboxes.
Git config: change deprecated tracking to upstream.
Ghci: remove OverloadedStrings.

It causes lots of modules not to compile.
Vimrc: highlight 100 character column.
Vimrc: remove silk tags file.

We now store it in .git/tags, which is added automatically (by fugitive I think).
Vimrc: add Cmd-0 - Cmd-9 to switch tabs.
Vim: add align commands for decls, imports and records.
Update ctrlp and fugitive.
Ignore .netrwhist.