CommandLine can't execute commands in PowerShell

[Riduidel]

Seems like CommandLine on Windows always use cmd.exe, even on Windows 10 platforms.
However, on these platforms, PowerShell provides longer command(line, which is very useful for projects running java commands with full CLASSPATH in (take a look, as an example, to On Windows, command line may be too long)

[michael-o]

The entire concept is illdesigned by invoking a shell instead of the processes directly. This needs to be changed as a whole.

[slachiewicz]

see #37