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Changed SQL 'roles' to 'role' for consistency.
Update PHP to correspond with new SQL updates.
Corrected roles table in SQL; added extra users, one for each role; added description onto Roles
Updated stylesheet
Created tables for the form data input on manageUsers; added extra fields from updated SQL
Corrected error on menu page
Added different users access on manageModules; added: create, modify and delete for the modules