fix: filename in excursion set was con_0001
Merge pull request #6 from cmaumet/master

Harmonizing FSL example with SPM example
enh: new entities

* new entities: standard error, resMS, stat_image_properties
* couple of fixes for excursion_set_it.
* update of provn, json and ttl serializations and pdf and svg exports.
Merge pull request #10 from cmaumet/spmtypos

Correct typo in attribute `fileName` of `excursion_set_id`
Merge