public MalmoObservationSpaceGrid(java.lang.String name,
Construct observation space from a array of blocks policy should distinguish between.
name - Name given to Grid element in mission specification
xSize - total x size of grid
ySize - total y size of grid
zSize - total z size of grid
blocks - Array of block names to distinguish between. Supports combination of individual strings and/or arrays of strings to map multiple block types to a single observation value. If not specified, it will dynamically map block names to integers - however, because these will be mapped as they are seen, different missions may have different mappings!