Author: David Monllao
MDL-38857 tool_behat: Adding info about the tool purpose
http://git.moodle.org/gw?p=moodle.git;a=commit;h=210290a9051121d6a32bc7ee5fbd5002ba53725c
http://github.com/moodle/moodle/commit/210290a9051121d6a32bc7ee5fbd5002ba53725c
+ 2.5 en [aim,tool_behat]
+ 2.5 en [infoheading,tool_behat]