API search in synonym

[PerrineGilloteaux]

WHILE the search should also be performed in synonyms for now it is not (see LSFM) ,

expected behavior: search LSFM return only one entry mentionning in the description LSFM, while it should return all entries with topc light-sheet.
http://biii.eu/light-sheet-microscopy

[PerrineGilloteaux]

was also mentionned here #137