Created Several new Summarizers that use ngrams. At the moment they are
using a dummy ngram corpus this MUST be changed once the ngram
extraction code is finished. All unfinished things are marked with
//TODO
Merge branch 'master' of
https://github.com/rubenwolff/ETHz_HeadlineGenerator.git

Conflicts:
	ETHz_HeadlineGen/src/ethz/nlp/headgen/prob/NgramSimple.java
	ETHz_HeadlineGen/src/ethz/nlp/headgen/sum/ArticleTopicNGramSum.java