omit question mark in empty query
add version, robots.txt and omit empty query
keep the original file name for the clif analysis #1291
Merge pull request #1297 from spechub/1294-extend-hets-api

1294 extend hets api
Merge pull request #1298 from spechub/1291-clif-filenames

keep the original file name for the clif analysis #1291
clone with depth also bioportal
Merge pull request #1300 from spechub/cronjob-adjustment

clone with depth also bioportal
extract options from query string
added sanity check for unknown query keys
Merge pull request #1301 from spechub/1293-command_line_options_as_query_strings

extract options from query string
added access token to options #1292
actually append access token to URI when downloading #1292
Merge pull request #1302 from spechub/1292-handle_access_token

1292 handle access token
improve RDF parser
use Turtle Test Suite (http://www.w3.org/TeamSubmission/turtle/tests/)
fixed Prelude.head error (localPart is already fixed while parsing)
keep test output
use prefix genid instead of bnode for blank nodes to pass more tests
a syntax (abbreviation for rdf:type) is already handled while parsing
test 11 requires more permissive resource names