Changing a namespace is a breaking change and should not be introduced in a minor version

@simoncropp

There are 95 improvements and fixes in the latest version of Aspose.Words. Every new release contains new features, enhancements and fixes. There were many classes which were not under right namespace. So, we added some new namespaces in this release and included related classes in them. Please update the your code according to latest APIs. We apologize for your inconvenience.