Increase max. transfered Object size to 10MB

So Datentechnik Innovation can store pdfs within the
Archistar System.
change index response type from text/plain to applicaiton/xml
Merge branch 'master' of github.com:andreashappe/archistar-core

Conflicts:
	src/main/java/at/ac/ait/archistar/frontend/s3/FakeRoot.java