setitem on Data with tuple

[gb119]

Steps to reproduce:
from Stoner import Data
d=Data(np.ones((2,2)))
d[0,0]=5

Shoykd set the top left element of the data to 5 but actually creates a metadata with key (0,0).
Need to sanitise handling of tuple setitem on DataFile

[gb119]

Fixed in commit 458eca3 @gb119 gb119 committed 2 minutes ago