Merge branch 'v2_0_0' into security

.../deadlocker8/budgetmaster/controller/IndexController.java

...eadlocker8/budgetmaster/controller/PaymentController.java

...in/java/de/deadlocker8/budgetmaster/entities/Payment.java

...eadlocker8/budgetmaster/entities/RepeatingDefinition.java

...e/deadlocker8/budgetmaster/repeating/RepeatingOption.java

...ocker8/budgetmaster/repeating/endoption/RepeatingEnd.java

...etmaster/repeating/endoption/RepeatingEndAfterXTimes.java

...r8/budgetmaster/repeating/endoption/RepeatingEndDate.java

...8/budgetmaster/repeating/endoption/RepeatingEndNever.java

...r8/budgetmaster/repeating/modifier/RepeatingModifier.java

...udgetmaster/repeating/modifier/RepeatingModifierDays.java

...getmaster/repeating/modifier/RepeatingModifierMonths.java

...dgetmaster/repeating/modifier/RepeatingModifierYears.java

.../de/deadlocker8/budgetmaster/services/PaymentService.java

src/main/resources/languages/_de.properties

src/main/resources/languages/_en.properties

src/main/resources/static/fontawesome-5.0.10/LICENSE.txt

src/main/resources/static/fontawesome-5.0.10/README.md

...ain/resources/static/fontawesome-5.0.10/css/fa-brands.css

...resources/static/fontawesome-5.0.10/css/fa-brands.min.css