Initial checkin of Excel.JsionToOfficeTable

Initial checkin of Excel.JsionToOfficeTable
Small documentation updates
Alpha order  methods (within region)
Add BestMatchContentTypeId to find best matching list content type for a web content type
Arrange methods in alpha order
Add CreateDoumentSet(), add content type constants
Provide both CreateFolder methods as well as EnsureFolder
Add function to UploadFile that allows content type to be specified, and returns the File so that additional properties can be set.
Consolidate upload methods, mark variants that don't match object name as obsolete.