CONTRIB-4864 Correct grade calculation when timeframe used in export.
CONTRIB-4052 Prevent gradebook entry from being added when using nograde
Update Attendance to use new events insted of add_to_log for 2.7
CONTRIB-4864 prevent PHP warning when checking var
convert to using $plugin instead of $module
remove php warning from report page when no sessions exist
init  sessionstat vars correctly
Display the number of users in the sessions report (take II)
Merge pull request #35 from nadavkav/patch-6

Display the number of users in the sessions report (take II)
remove double semi-colon
uon merge conflict fixes
Merge pull request #45 from drjosephbaxter/master

uon merge master
Allow older backup files to be restored correctly.