Uses isinstance() instead of type() check.
Uses isinstance() instead of type() check.

quiqua/flask-restless,donovan-graham/flask-restless,CommonsCloud/CommonsRestless,ternaris/flask-restless,iceone/flask-restless,donovan-graham/flask-restless,emilyemorehouse/flask-restless,dan-compton/flask-restless,ternaris/flask-restless,jkatzer/flask-restless,iceone/flask-restless,jkatzer/flask-restless,mayuroks/flask-restless,jwg4/flask-restless,donovan-graham/flask-restless,ternaris/flask-restless,jfinkels/flask-restless,dan-compton/flask-restless,dan-compton/flask-restless,victorliun/flask-restless,jkatzer/flask-restless