Transcription.Add now adds chapter and/or section if adding section or paragraph automatically..
translated some missed error strings int TranscriptionParagraph
modified TranscriptionParagraph(List<Phraze>) constructor to TranscriptionParagraph(IEnumerable<Phraze>)
Added constructor TranscriptionParagraph(params Phraze[])
Added impoer and export plugin for SRT format (UTF-8 only)