Rename fromPromise to encaseP

[Avaq]

This question illustrates confusion about the fromPromise function which I think was, in part, caused by the naming of the function.

From Promise suggests that the function takes in a Promise and returns a Future. In fact it encases a function which returns a Promise to return a Future instead, very similar to the encase family of functions.

To make the similarities between the two families of functions more apparent, I'm thinking to rename fromPromise to encaseP. This would also naturally provide a name for encaseP(f, undefined): tryP(f).