Merge pull request #254 from acz-icm/master

Language identifier and stopwords moved to commons
stacked heurs
heuristic in subworkflow
small fixes
file location fixes
modular architecture for heuristic workflow
new hashes, some refactoring
multiple heurs
extending memory
Merge pull request #255 from matfed/master

Stacked heuristics
Language identifier removed from CoAnSys, it is already in ceon-commons
Merge branch 'master' of git://github.com/CeON/CoAnSys
Added nb-configuration to .gitignore