README.md: document Windows/miktex crash

Closes #1.
Don't use microtype by default; I'll make it an option
This option uses XeTeX to create the PDF, using nice fonts

The Makefile is modified to compile your thesis with the XeTeX engine
(http://tug.org/xetex/) rather than standard LaTeX. The main benefit of this
is that XeTeX supports modern fonts much better than classic LaTeX; in this
author's judgment, you can do much better than standard LaTeX with a
well-chosen font (Times New Roman, or Libertine on Linux). XeTeX also lets you
use Unicode characters (such as: é Å ☺) directly in your document. See the
XeTeX homepage (http://tug.org/xetex/) or Google for more information.

If in doubt, ignore this option.

(This commit tracks an update to the master branch that turned off the
microtype package by default.)