commit #29 - adding buttons to AgGrid in paper-view screen

...n/java/com/diss/omppapp/services/LecturerInfoService.java

...nents/DeletePaperButton/delete-paper-button.component.css

...ents/DeletePaperButton/delete-paper-button.component.html

...onents/DeletePaperButton/delete-paper-button.component.ts

...nents/ViewClassesButton/view-classes-button.component.css

...ents/ViewClassesButton/view-classes-button.component.html

...onents/ViewClassesButton/view-classes-button.component.ts

...ewSubmissionsButton/view-submissions-button.component.css

...wSubmissionsButton/view-submissions-button.component.html

...iewSubmissionsButton/view-submissions-button.component.ts

...urerDashboardComponents/lecturer-dashboard.component.html

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

...ents/LecturerPaperView/lecturer-paper-view.component.html

...onents/LecturerPaperView/lecturer-paper-view.component.ts

ompp-web/src/app/LecturerComponents/lecturer-root.module.ts