rasdapy: arrays have wrong dimension and wrong sdom

[Dimitar Misev]

Executing a query like select encode(mr2, "png") from mr2 results in a 3D array with size 22623 (number of cells).

This is wrong, the output from rasql is a 1D array with size 22624.

I'm not sure why the array is 3D at all (some hard-coded solution); the size bug is likely because rasdapy takes the upper bound from the sdom [0:22623] and doesn't add 1 to it when calculating the size.