Feature Request: Add prop to force equal number of hexagons in every row

[calvbore]

In the current implementation after setting the maxHorizontal the rows alternate in length between maxHorizontal and maxHorizontal -1.

I suggest adding a boolean prop that forces every row to the set maxHorizontal length if it can be filled by tiles. It seems this behaviour is already present when maxHorizontal = 1.

Possible names for this prop are forceLength or forceHorizonal, but the name is really not that important.