use 3 arg open and variable handle in boilerplate code (and remove IO::File)

 that gets used anywhere cpan modules are installed

I'm writing my first CPAN module, and thought - what does perl critic tell me, and it complains about the generated Build.PL

which I presume is a cracked window lots of users of M::B see.

I'm willing to go do more, but I thought I'd ask - are you guys interested in this kind of gnomish-work?

Sven