Configure Compiler Warnings and Errors

There should be the option to customize the error or warning behavior of the compiler.

| Possible problem | description |
| ----------------------- | ------ |
| native Methode | There is a reference to a native method without replacement. This can result in a break or an unreachable code exception. Then only if the method is called an runtime error occur. |
| missing class/method | There is a reference to a library that is not ship. |
| exclude classes | There are classes in a library that should not be included to reduce the compile size. |

| Possible scopes | description |
| ---------------- | ------ |
| all | Problems in all classes should be ignored |
| library | Problem classes from library and Java runtime should be ignored |
| java | Problem classes from Java runtime should be ignored |
| none | Any problem should be break the compiler run |
| pattern | Problems in classes that match a pattern like java.lang.* should be ignored. The pattern should follow the calling script like Gradle. |

Samples:

* ignoreNative=all
* ignoreMissing=library
* excludeClasses=java.net.*

Are there more possible problems and scopes? Is the syntax understandable? Suggestions are welcome.