Signed-off-by: Luis Araujo <luis.araujo@collabora.co.uk>

This commit adds the unit test module for the renderer.

It includes tests for the parser, renderer and relevant formatting
methods. It also adds a set of files that are used by some of these
tests.

The commit also updates the README file explaining how to execute
these tests.

Signed-off-by: Luis Araujo <luis.araujo@collabora.co.uk>

Explain some of the format rules and parser behaviour
in the README file.

This commit also fixes a minimal typo in the render-test-case
comments.

Signed-off-by: Luis Araujo <luis.araujo@collabora.co.uk>

Signed-off-by: Luis Araujo <luis.araujo@collabora.co.uk>

- Update the README listing existing macros and how to
  use the renderer.
- Rename the main program to render-test-case
- Rename the tc directory to tests-cases

Signed-off-by: Luis Araujo <luis.araujo@collabora.co.uk>

- Add a new post-condition section.
- Add a new macro to install packages for automated tests.
- Slightly change the way the function to parse lists work. Now
  only the run.steps section will be treated different from
  other sections.
- Apply syntax changes to the already ported test cases.
- Add new ported test cases.
- Update the README explaining a rule for the formatter.

Signed-off-by: Luis Araujo <luis.araujo@collabora.co.uk>

Signed-off-by: Luis Araujo <luis.araujo@collabora.co.uk>