moved dump classes to specific packages; added tests; some readme notes
Merge branch 'dump' of github.com:crate/elasticsearch-inout-plugin into dump
replaced generated class javadoc
made dump section in readme.txt more readable
replaced generated class javadoc with something usefull
removed HTTP GET handlers for _dump endpoint
Merge branch 'dump' into mappings-dump

Conflicts:
	src/main/java/crate/elasticsearch/rest/action/admin/dump/RestDumpAction.java
node distribution for index dump request
create index dump mappings file, failure response