Add try_[zip_[zip_]]map methods to Matrix

[Patiga]

I'm building a library where I want to catch overflows of integer calculations.
I didn't see a method with which I could flatten Options in a matrix, which would've been a workaround (the closest would maybe be something with fold).
Such a function would also not short-circuit and result in at least one more copy, although it could also be considered.

The try_[zip_[zip_]]map are just like their non-try counterparts, except that they accept a function that returns an Option.
If the function returns None for any of the elements, None is returned.
Otherwise, a matrix with all the Some values is returned (not wrapped in the Option)

Short example

vector
    .try_map(|n| n.checked_mul(100))?
    .try_zip_map(parallax, |(n, p)| n.checked_div(p))?

I am also using another non-std integer type, from the fixed crate.
Afaik, try_map also helps here because of fallible conversions.