Add Annotation Processing for @Provisional

[Segelzwerg]

SportToolBox/src/main/java/segelzwerg/sporttooolbox/Provisional.java

Lines 5 to 9 in 3a3cdc9

	@Documented
	@Retention(RetentionPolicy.RUNTIME)
	@Target(ElementType.FIELD)
	public @interface Provisional {
	}

This should print a warning in the console that the use of this field is highly like to change.

Probably reflections are a good idea.