remove dependency on scalaz => replace Validation with Try
Merge remote-tracking branch 'upstream/develop' into develop

Conflicts:
	modules/client-java/src/test/java/be/vlaanderen/awv/atom/java/FeedProcessorTest.java
implement review comments: consume => accept, use mapping on Try instead of pattern matching where possible
flatMap that shit!
minor tweaks
- formatting
- removed warnings
- EntryConsumer is Scala function