chromium: adds Flash "profile" support
Adds --toggle option to `mon`

Toggles the external monitor on or off depending on whether it's
currently connected.
Adds `sbt` launcher wrapper
Adds `pg-env` PostgreSQL connection tool
Adds `build-vim` script which wraps `bisect-vim`

`bisect-vim` is a more general HG/Git bisect script for testing changes
against Vim.  `build-vim` calls it with parameters for installing Vim
into `/usr/local`.
Updates `vb` script to handle "multi-box" IDs

Old `vagrant` only stored a single `.vagrant` file.  New `vagrant` has
multiple, easier-to-parse `id` files, even if there's only a single
machine.
Fixes `charnames` handling of Ux0080-Ux00FF
Splits chromium-theme generator into separate cmd

Might be useful for non-"scratch" instances of Chromium, and it
definitely makes `chromium` shorter.