Hopefully the last beta for 1.9.8, might just tag this final over the weekend.
- Bugfix for issue introduced in beta 5 with double disposal (#670)
- Bundled Exchange script should support 2007+ instead of 2013+ now, thanks @nemchik
- Bundled scripts should work on Powershell 2.0+ now, thanks @WinnME
- SelfHosting instead of FileSystem is now default when no ValidationPlugin is specified