replaced e.printStackTrace() with logger

src/main/java/de/deadlocker8/budgetmaster/Main.java

...in/java/de/deadlocker8/budgetmaster/backup/GitHelper.java

...e/deadlocker8/budgetmaster/backup/LocalGitBackupTask.java

.../deadlocker8/budgetmaster/backup/RemoteGitBackupTask.java

.../de/deadlocker8/budgetmaster/database/DatabaseParser.java

...de/deadlocker8/budgetmaster/database/DatabaseService.java

...a/de/deadlocker8/budgetmaster/images/MediaController.java

...de/deadlocker8/budgetmaster/reports/ReportController.java

...deadlocker8/budgetmaster/settings/SettingsController.java