Committed left over changes
short museum example
added the ESWC paper's example
RefObjMap for CSV files
fixed object having null value - do not generate triple
first draft mapping file for iMinds
added mapping for research groups
RefObjMap for XML files
Merge branch 'master' of git.mmlab.be:rml/rmlprocessor into git.mmlab.be
new mappings
do not generate triples for empty objects
do not generated empty subject maps
correction over the object control
Reinstated delegation to performers; added support for multivalue objects & predicates. Pass test 1 & 2, delta on test 5
Pass example 1-4. Fixed joins, added new JSONPath parser version. Added JSONPath checks for return types
Merge branch 'master' of git.mmlab.be:rml/rmlprocessor into git.mmlab.be
Fixed some holes
Merge conflict; tests are broken
Reverted graph to example.org for tests. Removed obsolete .getName(), is not used?  getIdentifier is present.
small cleanup