Added ICAL extracter
ICAL
Fixed iCal extractor
Added JSON extractor
Extended mapping to support LD resource retrieval
Merged
Minor fixes to Linked Data resource retrieval chain
Stopped RDF loading when unable to write to database.
Added SHP extractor, works streamingly. This implements issue #3.
Removed trailing slash
Added reference by column name support to vertere
Merged pull request 1
merged feature-scheduler
added a Worker