.vimrc: Healthy visualization of tab characters.

Signed-off-by: Wayne <wayne@puppetlabs.com>
vim: Adds vim-slime submodule.

Also adds filetype commands to specify spaces instead of tabs for haskell and
literate haskell.

Signed-off-by: Wayne Warren <waynr@sdf.org>
vim: Add submodule mapping for vim-slime.

Signed-off-by: Wayne Warren <waynr@sdf.org>
vimrc: Fix lhaskell,haskell auto commands.

Signed-off-by: Wayne <wayne@puppetlabs.com>