Improved: Add rat exclude files to excludes those files that does not need
license header
No functional change, a last try after looking at another example (Jmeter after
Celix and Tomcat for last tries)
- .project Eclipse project file, only in plugins for now
another solution should be provided
-.*docbook.*
-applications/content/dtd/.*
+OPTIONAL_LIBRARIES
+**/*docbook*/**
+applications/content/dtd/**
-.*\.md
-OPTIONAL_LIBRARIES
-\.project
\ No newline at end of file
+*.md
+**/*.md
+
+.project
+**/*.project
\ No newline at end of file
