Fixed bug with document lengths
Merge branch 'master' of github.com:florianeckerstorfer/ir-exercises

* 'master' of github.com:florianeckerstorfer/ir-exercises:
  - maxDocumentCount deleted.
  - small bug fix: (-> addDocumentLength caused NullPointerException)

Conflicts:
	exercise1/src/ir/exercise1/textindexer/indexer/TextIndexer.java