[NPANDAY-601] enable the /platform argument

git-svn-id: https://svn.apache.org/repos/asf/incubator/npanday/trunk@1514693 13f79535-47bb-0310-9956-ffa450edef68
Load plugins as x86

This ensures that the correct registry will be used for the
NPanday.Plugin.Settings lookup on 64-bit installations. If it is loaded as
64-bit, then the registry lookup will not locate the 32-bit .NET Framework
registry entries.

git-svn-id: https://svn.apache.org/repos/asf/incubator/npanday/trunk@1514694 13f79535-47bb-0310-9956-ffa450edef68