added the possibility to get result by identifier
fix issue when response is not array
when identifier does not exist, it should return null instead of throwing exception
bumped neo v to 2.1.5 and 2.1.6
updated deps and removed print statements
fixed result formatter and cache, ready for 2.0 stable
added doc for get result
Merge pull request #20 from neoxygen/restformat

added the possibility to get result by identifier