Added a F.A.Q, updated screencast

doc/faq.rst

@@ -0,0 +1,14 @@
+F.A.Q
+=====
+
+**Q. When running the test suite in Windows' ``cmd.exe``, the test executable
+prints weird characters, how do I fix that?**
+A. Windows' ``cmd.exe`` is not an unicode ANSI-compatible terminal emulator.
+There are plenty of ways to fix that behaviour:
+* Pass ``--ascii`` to the test suite when executing.
+* Define the ``CRITERION_USE_ASCII`` environment variable to ``1``.
+* Get a better terminal emulator, such as the one shipped with Git or Cygwin.
+
+**Q. I'm having an issue with the library, what can I do ?**
+A. Open a new issue on the `github issue tracker <https://github.com/Snaipe/Criterion/issues>`_,
+and describe the problem you are experiencing.

doc/index.rst

@@ -9,3 +9,4 @@ Criterion
     starter
     hooks
     env
+    faq