Extended freeling regular expression parser with punctuation
Regular expression matching takes three columns, according to freeling.
- Using codecs to read files in utf-8 encoding.
- Added third column to freeling files.
Added option to provide a single file as inpput to ml-translationese
Fixed parsing of sentences
- IMPORTANT: the end of any freeling file *must* end with at least
  two empty lines, otherwise the last sentence will not be considered.
Freeling files as processed as being ended by a #