Add a readme for the tests.

tests/README.rst

@@ -0,0 +1,38 @@
+Salt Bootstrap Script - Integration Testing
+===========================================
+
+Testing ``salt-bootstrap`` requires both Python and Perl.
+
+Yes, it's weird that a shell script uses either one of the above languages for testing itself, the 
+explanation though, is simple.
+
+Perl is required because we use a script, `checkbashisms`_, which does exactly what it's name says. 
+In our case, it tries it's best to find non ``POSIX`` compliant code in our bootstrap script since 
+we require the script to be able to properly execute in any ``POSIX`` compliant shell.
+
+Python is used in the integration tests. It greatly simplifies running these tests and can even 
+provide some JUnit compliant XML used to generate reports of those tests. Doing this job in shell 
+scripting would be too cumbersome and too complicated.
+
+Running the tests suite
+-----------------------
+
+Running the tests suite is as simple as:
+
+.. code:: console
+
+  python tests/runtests.py
+
+
+For additional information on the available options:
+
+.. code:: console
+
+  python tests/runtests.py --help
+
+
+.. warning:: The test suite is **destructive**. It will install/un-install packages on your system.
+
+
+.. _`checkbashisms`: http://sourceforge.net/projects/checkbaskisms/
+.. vim: fenc=utf-8 spell spl=en cc=100 tw=99 fo=want sts=2 sw=2 et