Add aspell-en package in prerequisites

[asas1asas200]

Aspell-en is a "recommend" package in Ubuntu, so it will be installed with aspell package.
But in other distros like Arch, it won't auto install, and terminal will output error by below when I commit:

Error: No word lists can be found for the language "en".

But I can still commit successfully with this error.

So I think that should be added in readme or adding a protect in pre-commit hook.

[jserv]

Can you improve the pre-commit hook for checking /usr/lib/aspell/en*.rws? Alternatively, you can contribute the notice for Arch Linux.

[asas1asas200]

I will try it.