Removed all references to "key"-s.
Renamed asset "type" to "token" with backward compatability check.
 Added asset's property parsing.
added access to default layer.
Fixed default property issue.
Changed Board Structure.
implement ratio parsing
fix ratio distribution bug
fix ratio distribution bug
make minor corrections in generate function
shared build config. updated test JSON (not final)
implement ratio, count, random distribution of assetInfos
remove definition of unnecessary variable
fix bug
make changes according to comments
clean up
parse updated JSON