Support Django rest framework 3.2
Support Django rest framework 3.2

DRF has deprecated/remove request.DATA in favor of request.data

http://www.django-rest-framework.org/topics/3.2-announcement/
Fixes #147

guker/augmented-traffic-control,yershalom/augmented-traffic-control,hai8108/augmented-traffic-control,guker/augmented-traffic-control,Endika/augmented-traffic-control,venkateshdaram434/augmented-traffic-control,yershalom/augmented-traffic-control,guker/augmented-traffic-control,venkateshdaram434/augmented-traffic-control,zfjagann/augmented-traffic-control,zfjagann/augmented-traffic-control,Endika/augmented-traffic-control,yershalom/augmented-traffic-control,drptbl/augmented-traffic-control,guker/augmented-traffic-control,venkateshdaram434/augmented-traffic-control,hai8108/augmented-traffic-control,hai8108/augmented-traffic-control,liwangdong/augmented-traffic-control,hai8108/augmented-traffic-control,biddyweb/augmented-traffic-control,zfjagann/augmented-traffic-control,Endika/augmented-traffic-control,yershalom/augmented-traffic-control,drptbl/augmented-traffic-control,guker/augmented-traffic-control,drptbl/augmented-traffic-control,liwangdong/augmented-traffic-control,liwangdong/augmented-traffic-control,biddyweb/augmented-traffic-control,zfjagann/augmented-traffic-control,biddyweb/augmented-traffic-control,zfjagann/augmented-traffic-control,liwangdong/augmented-traffic-control,biddyweb/augmented-traffic-control,biddyweb/augmented-traffic-control,yershalom/augmented-traffic-control,Endika/augmented-traffic-control,venkateshdaram434/augmented-traffic-control,liwangdong/augmented-traffic-control,drptbl/augmented-traffic-control,venkateshdaram434/augmented-traffic-control,Endika/augmented-traffic-control,hai8108/augmented-traffic-control,drptbl/augmented-traffic-control