Added/updated import data
Added review processing
Fixed styling
Added validation
Updated import file
added duplicate entry check
Added message for invalid file
Merge branch 'f/excelImportReview' of https://github.com/waaghals/Tainted-Aberrant-Lion into f/excelImportReview

Conflicts:
	Classes/PROJ/Controllers/ManagementController.php
fixed student processing bug and updated import.xlsx
Added after-upload view and sanitized input
Update Test Scenarios.md

Updated test scenario voor excel uploaden
fixed sanitized data bug
Removed usage global $_FILES
Added check if file is readable by PHPExcel
Added setup for headercheck
Added check for invalid excel format
Merge branch 'dev' into f/excelImportReview

Conflicts:
	Doc/Test Scenarios.md
	importPresentatie.xlsx
Merge pull request #137 from waaghals/f/excelImportReview

F/excel import review