better support for bee level builder

(1) Add new field flowerType that determines how we display flowers for bee.
- Note: if I didn't limit this string size, I got an error on the migration about the row being too large.  We may want to also limit the string size for some of the other columns on this row.
- Is there a better way of doing this than adding another column to the row?  I've just realized I'm going to need at least one more configurable field for bee still also.

(2) Added some clarification for how bee honey/nectar works in terms of the level grid.