version higher than
html emails
a lot things

26-30, 38: cron prefix and its callback function

74-75: action before delete post

89-92, 94-97, 101, 106, 111: schedules

137-144: function accepts 2 args( id, days). functions alert depending
of the course.

164-167: reset crons

174-180:update db vars

247-251: remove slashes

300-306: better description for msg table

360: hide delete all button

418-459: 2 option added to course metabox

515-609: schedule events for every msg

724-739: general function for msg

722-772: expiration function

786-: helpers
msg metabox

select day when message is to be send it
wp_editor
deleted return $state

to avoid  problems in redirection.
version
Merge branch 'new-approach'