Colorize output of run-*test.sh.

Remove the use of ack in run-all-tests.sh.

Signed-off-by: Rüdiger Sonderfeld <ruediger@c-plusplus.de>
add org-reveal recipe for package to export org-mode to Reveal.js presentations

package depends on Org Mode 8.0, so 'depends org-mode' was added explicitly
Merge pull request #1222 from ruediger/test-colors

Colorize output of run-*test.sh.