[Kst-plot/kst] 982eb0: Bug fixes for export png in pykst

[Barth Netterfield]

  Branch: refs/heads/master
  Home:   https://github.com/Kst-plot/kst
  Commit: 982eb0469669c36f63503c163c6a46d73d2258ff
      https://github.com/Kst-plot/kst/commit/982eb0469669c36f63503c163c6a46d73d2258ff
  Author: Barth Netterfield <netterfield at astro.utoronto.ca>
  Date:   2016-08-23 (Tue, 23 Aug 2016)

  Changed paths:
    M pyKst/demo/dataobjects.py
    M pyKst/demo/exportpng.py
    M pyKst/pykst.py
    M src/libkstapp/mainwindow.cpp
    M src/libkstapp/scriptserver.cpp

  Log Message:
  -----------
  Bug fixes for export png in pykst