Fix delimiter variable name
NOJIRA Fix typos / required params in ca_data_importers

* ncurses_refresh() requires a character to refresh. Took a guess and it seems to work
* vb_use_ncurses was always false.
* ncurses_init() has a void return.
* $vn_c not defined when trying to parse idno. As idno cannot be multi valued I pass an explicit null (which is what it would do anyway)
* $vn_index is not tefiend for $va_item['settings']['delimiter'] on line 1899
* Also pass the importEvent and importEventSource to hookDataImportContentTree

Conflicts:
	app/models/ca_data_importers.php
NOJIRA oops putting back the missing 'mapping' element.
Merge pull request #134 from kehh/importFixesForUpstream

NOJIRA - Importer fixes and pass import event to import plugin