Preprocessing module for parsing (for EtTenTen format)

Preprocessing module, to be used before parsing. This version includes two modules for preprocessing EtTenTen corpus text types: the first one for newspaper, government, religious, informative and unknown texts (eeltootlus_ettenten.py, ettenten_patterns.py) and the other for forums and blogs (eeltootlus_ettenten_blg_frm.py, ettenten_patterns_blg_frm.py).