docs are not searchable
for someone coming into arraymancer, it's hard to use the docs.
the drop-downs run past the bottom of my screen and it's not clear which to choose for a given operation.
For example, I want the elementwise min of 2 tensors of shape `[$n]` the best I could come up with is:

```Nim
concat(a, b, axis=0).reshape(a.shape[0], 2).min(axis=1).squeeze(1)
```
is there a better way?

I suppose I could use forEach in `laser`, but I thought there could be a simple way within arraymancer.