[Kst-plot/kst] c67153: Add a pykst command: update_parent()

[Barth Netterfield]

Branch: refs/heads/master
Home: https://github.com/Kst-plot/kst
Commit: c671530dc7880c776a49d1162688a5d5be0ecca3
https://github.com/Kst-plot/kst/commit/c671530dc7880c776a49d1162688a5d5be0ecca3
Author: Barth Netterfield <***@astro.utoronto.ca>
Date: 2016-08-27 (Sat, 27 Aug 2016)

Changed paths:
M pyKst/demo/plot_layout.py
M pyKst/demo/viewitems.py
M pyKst/pykst.py
M src/libkstapp/plotrenderitem.h
M src/libkstapp/viewitem.h
M src/libkstapp/viewitemscriptinterface.cpp

Log Message:
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Add a pykst command: update_parent()