v0.6.1

Changed

• Implicit flows having very unhelpful names, making debugging annoying and
  difficult. (They now are named according to the stock they target and which
  index inflow they are on that stock)

Fixed

• Index operation incorrectly handling non-timeseries values
• stack and several element-wise operations breaking when model run with n>1
  due to numpy broadcasting issues
• Variables added to diagram from stock min/max refs even if show_vars is False
• Stock sparklines inconsistent with flow sparklines in diagrams