commit #33 - adding graphs, styling

...rc/main/java/com/diss/omppapp/api/LecturerController.java

...ava/com/diss/omppapp/entities/LecturerClassessEntity.java

...main/java/com/diss/omppapp/pojo/ResponseGraphDetails.java

...iss/omppapp/repositories/MinutePaperEntityRepository.java

.../omppapp/repositories/StudentClassesEntityRepository.java

...main/java/com/diss/omppapp/services/ClassInfoService.java

...main/java/com/diss/omppapp/services/GraphDataService.java

ompp-web/package-lock.json

ompp-web/package.json

...artComponents/ResponseChart/response-chart.component.html

...ChartComponents/ResponseChart/response-chart.component.ts

...cturerDashboardComponents/lecturer-dashboard.component.ts

ompp-web/src/app/dao/ResponseGraphDetails.dao.ts

ompp-web/src/app/services/lecturer-info.service.ts