Started the Cactus lookup.
Added the Cactus files.
Merge branch 'master' into cactus

Conflicts:
	src/main/java/io/github/egonw/CMLEnricher.java
Implemented asynchronous calls to the Cactus service.
Merge branch 'master' into cactus

Conflicts:
	src/main/java/io/github/egonw/CMLEnricher.java
Code cleanup. Added Enum type for cactus calls.