solarized: Add solarized support to vim.

Solarized is a nice colorscheme with syntax highlighting.

Homepage: http://ethanschoonover.com/solarized

Putty:
https://github.com/brantb/solarized/tree/master/putty-colors-solarized

Download solarized_dark.reg and solarized_light.reg. Double click
to add to the registry. Click on one before you create a new session.
To modify an existing session (i.e. digitalocean) change the key
name from "Solarized%20Dark" to "digitalocean."