Merge pull request #202 from read-write-web/master

simple fix for issue #186
Merge pull request #205 from read-write-web/topic/mime-error

"application/json-ld;"->"application/ld+json"
added ntriples writer
move ntriples to io folder, made fixes according to peer reviews, fixed overrides
memory reduction writing to OutputStream & fix eol
Merge pull request #1 from read-write-web/topic/ntripleswriter

memory reduction writing to OutputStream & fix EOL
upgrade akka-http-core-experimental
Merge remote-tracking branch 'anton/ntripleswriter' into eXchange2014

Conflicts:
	rdf/common/src/main/scala/org/w3/banana/RDFModule.scala