updated ODCS dependency to 1.1-SNAPSHOT
use file-backed repository for file sources when file cache is enabled
cleanup
revert use file-backed repository for file sources
A more sofisticated solution is needed in order to delete the temporary files afterwards
(reverse-merged from commit 1bda186600885454084e6a051b698a7dc83aa3dd)
support for multiple output types - preparations; introduced dataContext output parameter
cleanup
refactored output writers
support for multiple output types - SPARQL and Virtuoso