Colorize Log Output

This colorized all log output for logging levels >= ``WARN``. It uses yellow for ``WARN`` and red for ``ERROR``/``FATAL``.

It will intelligently disable coloring when it's not suitable (such as when piping to a file) and it *should* support colorization on Windows as well (this uses Colorama but I have not tested it).

It vendors the BSD licensed colorama package.

It also introduces a new a new logger method ``Log.deprecated`` which takes a position argument for the version that the deprecated item is slated to be removed in. It will then set the log level to ``WARN`` or ``ERROR`` based on how many versions until the deprecated item is slated to be removed (``WARN`` is > 1, ``ERROR`` otherwise).

It also moves the warning messages introduced in dc559473e2667de130cd3ed4d57c4e125ee10d93 to the new ``Log.deprecated`` method.

This fixes #1099 but the ``Log.deprecated`` work depends on a resolution to the backwards compatibility question (Semver vs Django style). It is currently written to support Django style but could easily be adapted to Semver.

Here is a picture of the logged messages at the warn and error levels:

![Logged Errors](http://d.stufft.io/image/1T1e1F0F370o/Image%202013.08.04%2010%3A56%3A56%20PM.png)