5 commits - for 3.1.5a (part I & II), for 3.1.5b, exammakeranalysis show page & staff-report in pdf

1-Added function to update exam1marks from exammarks into grades.

Upon creation/update of exammark record, replace Final Exam marks (exam1marks field) in grade table with the sum of entered marks. 

2-Assign value of total marks obtained for an exam to Final Exam (exam1marks) field in 'edit multiple grade' page

3-Added function to produce report and summary of exam result for each subject, programme and intake

4-Resolved - not working edit link in exammakeranalysis show page

5-Added function to create excel file for staff-report-maklumat perjawatan