Jenkins ChangeSet for http://dev.digital-humanities.de/ci/view/Top/job/DARIAH-Topics/425/

Update pip installation guide in IntroducingGensim.ipynb	by severinsimmler
#IntroducingGensim.ipynb
Update pip installation guide in IntroducingLda.ipynb	by severinsimmler
#IntroducingLda.ipynb
Update pip installation guide in IntroducingMallet.ipynb	by severinsimmler
#IntroducingMallet.ipynb