Move extracted files from temp location to destination instead of copying

[mkahvi]

Although copying is nice, moving would be faster if the temp file location is on same storage device. This also integrates deletion into same operation.

[Fyorl]

Well we copy because it's agnostic of storage location & OS. Attempting to rename a folder across different drives in Windows reportedly throws an error, though admittedly I haven't actually tried it.

[mkahvi]

On quick glance it indeed does not seem to work cross-platform reliably. fs-extra has moveSync() which apparently handles things behind the scenes, if added dependency is ok.