add 'raw' layer
Merge remote-tracking branch 'sipc87/common_dev' into naf

Conflicts:
	src/main/java/ixa/kaflib/KAFDocument.java
add 'raw' layer
Merge branch 'common_dev' into naf

Conflicts:
	src/main/java/ixa/kaflib/KAFDocument.java
	src/main/java/ixa/kaflib/ReadWriteManager.java