Added matplotlib backend support for Windows

Change-Id: I45d0f2a598f4cd13ea0efe43fea956232ddf3ead
Reviewed-on: https://iffwww.iff.kfa-juelich.de/review/39
Reviewed-by: Josef Heinen <j.heinen@fz-juelich.de>
Added support for transparent images in Windows

Change-Id: I662d933c19c383ff7f5ccd424f793a237d6e4a23
Reviewed-on: https://iffwww.iff.kfa-juelich.de/review/40
Reviewed-by: Josef Heinen <j.heinen@fz-juelich.de>