Fix compile errors introduced in last commit
Various minor changes
Extract new interface DebateFormatBuilderFromXml
Add support for schema 2.0 to DebatingActivity, with backwards compatibility measures
Only throw no speeches fatal error if the file follows schema 1.0
Don't throw IllegalStateException for no-speech debates, handle that possibility directly in DebatingActivity
Comment
Extract DebateFormatInfo interface
Get it to use the schema provided
Work on DebateFormatInfoForSchema2
Work on DebateFormatInfoForSchema2