Update highlighter.py
Update highlighter.py

Fixed the code. Nothing is deleted, now words are just set to -1 in case they are not in the dictionary ("word_index").
Input is the output files from JGibbLDA, stored in /amcat/models/jgibblda/pol/
tschmorleiz/amcat,tschmorleiz/amcat,tschmorleiz/amcat,tschmorleiz/amcat,tschmorleiz/amcat