Revert "Revert "moved handling ignored classes to its own analyzer""

This reverts commit 2a3bbea6c62a9c6dbe82c472b7d544a1e4353d15.

Conflicts:
	src/main/java/de/is24/deadcode4j/analyzer/IgnoreClassesAnalyzer.java
	src/test/java/de/is24/deadcode4j/plugin/A_DeadCodeLogger.java
Merge remote-tracking branch 'origin/master'

Conflicts:
	src/main/java/de/is24/deadcode4j/analyzer/IgnoreClassesAnalyzer.java
	src/main/java/de/is24/deadcode4j/plugin/FindDeadCodeOnlyMojo.java
	src/test/java/de/is24/deadcode4j/analyzer/An_IgnoreClassesAnalyzer.java
	src/test/java/de/is24/deadcode4j/plugin/A_DeadCodeLogger.java
	src/test/java/de/is24/deadcode4j/plugin/IT_PuttingItAllTogether.java
set fixed package name
PMD warning moved