Addresses #411
The `N1.sh` launch script fails to account for running from
`/usr/{local/}bin/nylas` where it would throw an error saying
it couldn't find the electron binary.
The Atom launch script works just fine and takes that into account.
The installed launch script here is a reflactored Atom launch script
that properly accounts for running the `nylas` executable and locates
the actual binary accordingly.