#23 Substructure/similarity query API

[Nina Jeliazkova]

Map substructure/structure/similarity queries into Algorithm API http://opentox.org/dev/apis/api-1.1/Algorithm

Currently:
Substructure
/query/smarts?search=c1ccccc1O&max=100

Similarity
/query/similarity?search=c1ccccc1&threshold=0.8
This assumes implicitly specific algorithm and parameters; to be refactored to match Algorithm API