template_preprocess_chessboard() performs I/O

This patch brings down the number of calls from about 16 to 0 or 16 to 4 depending on where the images come from.

#1: chessboard-io-995762-1.patch queued for re-testing.

#1: chessboard-io-995762-1.patch queued for re-testing.

#1: chessboard-io-995762-1.patch queued for re-testing.

Fails due to #996512: D6 contrib project tests: [MySQL] Drupal installation failed..

Committed #11.

#1 passes tests locally. Even so there is a problem:

+    // Append class atttribute.
+    foreach ($group_attributes as $group => $attributes) {
+      $group_attributes[$group]['class'] = 'chessboard-' . $group;
+    }

This will assign the class attrribute if width/ height attributes were assigned, which is not always the case if for some reason the size cannot be determined. I'm postponing writing a test for such cases until we remove old API functions and introduce an up-to-date API (and UI) for changing the image directory.

New patch is written to fix this and be more readable. Passes test locally.

These two comments are just... not good.
Automated testing should be back now... Let's see.

#1: chessboard-io-995762-1.patch queued for re-testing.

Yes! Drupal 6 install code is fixed and patch testing is back again *after* committing to the branch. Of course the patches do not apply anymore after having been committed. (Tested locally. And the branch is fine according to qa.)