Hey, I've developed an additional button for GESHI (https://moodle.org/mod/forum/discuss.php?d=176780) in TinyMce. It works fine, but is annoying to hack core moodle files.
Can anyone direct me to how to properly add new TinyMCE pluggins in Moodle 2.4. (Namely, this feature: http://tracker.moodle.org/browse/MDL-33041)
Thanks!