pomsets-gui 1.0.7 released

[michael j pan]

http://www.pomsets.org/Release/pomsets-gui-1.0.7

Changelog:

* fixes to disable editing once execution has started
* display execute status of tasks inside nested nests
* changed double click behavior to be more consistent across node types
* query user for name of definition to be created
* add ability to expose node parameters to containing nest
* changes to support nest creation and display in gui
* duplicate and delete selection
* draw edges to curve in the z plane, so that edges are drawn behind nodes
* set the application name on the main window
* fix issue with switching to display a pomset that has already
started execution
* fixes to prevent editing when there is no active pomset
* fix issue when closing last active pomset
* fixed issue with renaming pomset
* implemented a contextual menu for multiply selected object types
* various other ui fixes

This release requires the pomsets-core 1.0.6, which was released simultaneously.