Muster::LeafFile::txt - a plain text file in a Muster content tree
File nodes represent files in a Muster::Content content tree. This is a plain text file.
Test if this type of file creates a page or is just a file.
Convert the content into HTML (output) format. If the output is going to be .txt, then leave it as it is.
Fill in the meta-data for this file.
Calculate the word-count of the content.