DOCS: fix SoferWieckiFrank citation
Merge branch 'develop' of github.com:hddm-devs/hddm into develop
DOC: minor changes
Merge branch 'develop' of github.com:hddm-devs/hddm into develop
DOC: added citation for ipython
DOC: paper edit
Merge pull request #32 from hddm-devs/feature/docs_edit

Feature/docs edit