Index wishlist

[jcortesr]

Hi,

on Felix's request, here is a wish list for indexing cubes:

• For the time axis, can we remove a Date(s) by using -(Date(s))
• Alternatively can we give it a vector of dates that we wish to keep? Specifying a range does not work as my purpose is to remove February 29...
• Access the axes by index rather than the value itself, e.g., my_cube[time = 1] would give the first time step
• ...

Cheers, Jose