Fix mimetypes for .ods & .odp files in nodejs httpserver
Add ODF template variants to mimetypes set by nodejs httpserver
Load ODFViewerPlugin also for all template and flat variants of odt/odp/ods
Extend OdfContainer.DocumentType with template versions
Make template-type-state of document setable and queryable
Expose setTemplate/isTemplate in Wodo.TextEditor API
Note added support for document template variants
Support template types in docnosis
Make Wodo demo/testing code properly handle template documents
Merge pull request #779 from kossebau/supportTemplateMimetypes

Support template mimetypes