UoN Changes to allow students to mark their own attendance on sessions that have been set to allow it.

Adds a Report that lists only students who do not have full attendance.

Adds the Ability to send e-mails to students.
first round of fixes
fix for log page link
low grade report fix
found log function in attforblock
removed duplicate log word
changes attforblock to attendance
Merged in drjosephbaxter/moodle-mod_attendance/UoNChanges (pull request #1)

completion of mod_atforblock migration to mod_attendance
MOODLE-845 add idnumber to export
MOODLE-845 add department and institution
tidy up
typo
code review: removed new line
code review change new line without whitespace
fixing whitespce
Merged in drjosephbaxter/moodle-mod_attendance/UoNChanges (pull request #2)

MOODLE-845
UoN Changes to allow students to mark their own attendance on sessions that have been set to allow it.

Adds a Report that lists only students who do not have full attendance.

Adds the Ability to send e-mails to students.
first round of fixes
fix for log page link
low grade report fix