Install-TheFucker: Windows 10 PATH env

[reideast]

On Windows 10, PowerShell 5 ($PSVersionTable.PSVersion = 5.0.10586.63), my %PATH% variable has a trailing slash. I'm not sure if this is a strange artifact on my machine, but it causes
$pfk to be "C:\Users\User\AppData\Local\Temp\poshfuck.zip", and the double "" slash prevents the install from working.

I created a pull request #2 that fixes the issue by using Join-Path, per your example.

Thanks for writing this implementation!

[mattparkes]

Thanks for the Pull Request. I've reviewed it and merged it in.

I hope you have fun with PoShFuck!