ViewModel am EventBus registriert, um Events zu erhalten
ConfirmDialog implementiert; Beispiel in BookManagementView.
ungenutztes ViewModel gelöscht
Testdaten Insert-Skript leer nun Tabellen vor dem Insert der Daten -->
Datenbank kann nun einfach "resetet" werden
Merge pull request #420 from davvitt/issue#386-confirmDialog

Issue#386 confirm dialog
Style student information view
Merge pull request #421 from jidel/Style_studentInformation

Style student information view
Set application color theme
Merge pull request #422 from jidel/Application_Color_Theme

Set application color theme
Moved buttons to the top
Styled edit window
Merge pull request #427 from jidel/setting_buttons

Moved buttons in the settings view to the top
Merge pull request #428 from jidel/issue#423

Issue#423
Fixed height of window header
Merge pull request #430 from jidel/window_head

Fixed height of window header
Put grade and term in one line
Merge pull request #432 from jidel/issue#423

Put grade and term in one line (Window in BookManagementView)
Make window closable by ESC key
Merge pull request #433 from jidel/issue#431

Make window closable by ESC key
Merge remote-tracking branch 'upstream/develop' into issue#385