Merge pull request #658 from vgrigoriu/dev

Update PowerArgs to 2.0
adds a -logfile switch for mirroring all console messages to a file
#656 changed from -logfile to -output
#656 removed duplicate arg shortcut to please PowerArgs 2.x
Merge pull request #637 from adamralph/logfile

adds a switch for mirroring all console messages to a file
Support for loose methods for mono