v0.3.0-int.2

• Refactored Node.ToPlainText to receive an optional delegate for customizing how a Node should be converted into plain text. (#15)
  • Removed NodePlainTextOptions to this end.
• The following parser tags are not shown in ToPlainText output
  • math
  • ref
  • templatedata
  • templatestyles
  • To change this default behavior, refer to #15.