added usage example of type converter
added usage example of type converter

kaeawc/DBFlow,cgpllx/DBFlow,mickele/DBFlow,sujeet-kumar-mehta/DBFlow,pranaypatel512/DBFlow,Raizlabs/DBFlow,Raizlabs/DBFlow,dantman/DBFlow,janzoner/DBFlow,MyFavoriteFork/DBFlow,tsdl2013/DBFlow,leasual/DBFlow,pranavlathigara/DBFlow,mickele/DBFlow,yoshimaa/DBFlow,R4md4c/DBFlow,lichblitz/DBFlow,SeaSoon/DBFlow,hanhailong/DBFlow,sevar83/DBFlow,panzerfahrer/DBFlow